add-domain-email-setup-validation (#74)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: #74
Reviewed-by: Timotheus Pokorra <timotheus.pokorra@hostsharing.net>

doc/hs-hosting-asset-type-structure.md

@@ -12,7 +12,7 @@ package Booking #feb28c {
     entity BI_MANAGED_SERVER
     entity BI_MANAGED_WEBSPACE
     entity BI_DOMAIN_DNS_SETUP
-    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
+    entity BI_DOMAIN_SMTP_SETUP
 }
 
 package Hosting #feb28c{
@@ -20,8 +20,8 @@ package Hosting #feb28c{
         entity HA_DOMAIN_SETUP        
         entity HA_DOMAIN_DNS_SETUP        
         entity HA_DOMAIN_HTTP_SETUP        
-        entity HA_DOMAIN_EMAIL_SUBMISSION_SETUP        
+        entity HA_DOMAIN_SMTP_SETUP        
-        entity HA_DOMAIN_EMAIL_MAILBOX_SETUP        
+        entity HA_DOMAIN_MBOX_SETUP        
         entity HA_EMAIL_ADDRESS
     }
 
@@ -52,12 +52,12 @@ HA_DOMAIN_SETUP o..> HA_DOMAIN_SETUP
 HA_DOMAIN_DNS_SETUP *==> HA_DOMAIN_SETUP
 HA_DOMAIN_HTTP_SETUP *==> HA_DOMAIN_SETUP
 HA_DOMAIN_HTTP_SETUP o..> HA_UNIX_USER
-HA_DOMAIN_EMAIL_SUBMISSION_SETUP *==> HA_DOMAIN_SETUP
+HA_DOMAIN_SMTP_SETUP *==> HA_DOMAIN_SETUP
-HA_DOMAIN_EMAIL_SUBMISSION_SETUP o..> HA_MANAGED_WEBSPACE
+HA_DOMAIN_SMTP_SETUP o..> HA_MANAGED_WEBSPACE
-HA_DOMAIN_EMAIL_MAILBOX_SETUP *==> HA_DOMAIN_SETUP
+HA_DOMAIN_MBOX_SETUP *==> HA_DOMAIN_SETUP
-HA_DOMAIN_EMAIL_MAILBOX_SETUP o..> HA_MANAGED_WEBSPACE
+HA_DOMAIN_MBOX_SETUP o..> HA_MANAGED_WEBSPACE
 HA_EMAIL_ALIAS *==> HA_MANAGED_WEBSPACE
-HA_EMAIL_ADDRESS *==> HA_DOMAIN_EMAIL_MAILBOX_SETUP
+HA_EMAIL_ADDRESS *==> HA_DOMAIN_MBOX_SETUP
 HA_IP_NUMBER o..> HA_CLOUD_SERVER
 HA_IP_NUMBER o..> HA_MANAGED_SERVER
 HA_IP_NUMBER o..> HA_MANAGED_WEBSPACE
@@ -82,7 +82,7 @@ package Booking #feb28c {
     entity BI_MANAGED_SERVER
     entity BI_MANAGED_WEBSPACE
     entity BI_DOMAIN_DNS_SETUP
-    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
+    entity BI_DOMAIN_SMTP_SETUP
 }
 
 package Hosting #feb28c{
@@ -145,7 +145,7 @@ package Booking #feb28c {
     entity BI_MANAGED_SERVER
     entity BI_MANAGED_WEBSPACE
     entity BI_DOMAIN_DNS_SETUP
-    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
+    entity BI_DOMAIN_SMTP_SETUP
 }
 
 package Hosting #feb28c{

src/main/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemType.java

@@ -8,9 +8,7 @@ public enum HsBookingItemType implements Node {
     PRIVATE_CLOUD,
     CLOUD_SERVER(PRIVATE_CLOUD),
     MANAGED_SERVER(PRIVATE_CLOUD),
-    MANAGED_WEBSPACE(MANAGED_SERVER),
+    MANAGED_WEBSPACE(MANAGED_SERVER);
-    DOMAIN_DNS_SETUP, // TODO.spec: experimental
-    DOMAIN_EMAIL_SUBMISSION_SETUP; // TODO.spec: experimental
 
     private final HsBookingItemType parentItemType;
 

src/main/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedWebspaceBookingItemValidator.java

@@ -8,7 +8,7 @@ import java.util.List;
 
 import static java.util.Collections.emptyList;
 import static java.util.Optional.ofNullable;
-import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_EMAIL_MAILBOX_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_MBOX_SETUP;
 import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.EMAIL_ADDRESS;
 import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.MARIADB_DATABASE;
 import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.MARIADB_USER;
@@ -88,7 +88,7 @@ class HsManagedWebspaceBookingItemValidator extends HsBookingItemEntityValidator
         return (final HsBookingItemEntity entity, final IntegerProperty prop, final Integer factor) -> {
             final var unixUserCount = ofNullable(entity.getRelatedHostingAsset())
                     .map(ha -> ha.getSubHostingAssets().stream()
-                        .filter(bi -> bi.getType() == DOMAIN_EMAIL_MAILBOX_SETUP)
+                        .filter(bi -> bi.getType() == DOMAIN_MBOX_SETUP)
                         .flatMap(domainEMailSetup -> domainEMailSetup.getSubHostingAssets().stream()
                             .filter(subAsset -> subAsset.getType()==EMAIL_ADDRESS))
                         .count())

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetType.java

@@ -45,6 +45,10 @@ public enum HsHostingAssetType implements Node {
             inGroup("Webspace"),
             requiredParent(MANAGED_WEBSPACE)),
 
+    EMAIL_ALIAS( // named e.g. xyz00-abc
+            inGroup("Webspace"),
+            requiredParent(MANAGED_WEBSPACE)),
+
     DOMAIN_SETUP( // named e.g. example.org
             inGroup("Domain"),
             optionalParent(SAME_TYPE)
@@ -52,32 +56,29 @@ public enum HsHostingAssetType implements Node {
 
     DOMAIN_DNS_SETUP( // named e.g. example.org
             inGroup("Domain"),
-            requiredParent(DOMAIN_SETUP)),
+            requiredParent(DOMAIN_SETUP),
+            assignedTo(MANAGED_WEBSPACE)),
 
     DOMAIN_HTTP_SETUP( // named e.g. example.org
             inGroup("Domain"),
             requiredParent(DOMAIN_SETUP),
             assignedTo(UNIX_USER)),
 
-    DOMAIN_EMAIL_SUBMISSION_SETUP( // named e.g. example.org
+    DOMAIN_SMTP_SETUP( // named e.g. example.org
             inGroup("Domain"),
             requiredParent(DOMAIN_SETUP),
             assignedTo(MANAGED_WEBSPACE)),
 
-    DOMAIN_EMAIL_MAILBOX_SETUP( // named e.g. example.org
+    DOMAIN_MBOX_SETUP( // named e.g. example.org
             inGroup("Domain"),
             requiredParent(DOMAIN_SETUP),
             assignedTo(MANAGED_WEBSPACE)),
 
     // TODO.spec: SECURE_MX
 
-    EMAIL_ALIAS( // named e.g. xyz00-abc
-            inGroup("Webspace"),
-            requiredParent(MANAGED_WEBSPACE)),
-
     EMAIL_ADDRESS( // named e.g. sample@example.org
             inGroup("Domain"),
-            requiredParent(DOMAIN_EMAIL_MAILBOX_SETUP)),
+            requiredParent(DOMAIN_MBOX_SETUP)),
 
     PGSQL_INSTANCE( // TODO.spec: identifier to be specified
             inGroup("PostgreSQL"),

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HostingAssetEntityValidatorRegistry.java

@@ -23,6 +23,9 @@ public class HostingAssetEntityValidatorRegistry {
         register(DOMAIN_SETUP, new HsDomainSetupHostingAssetValidator());
         register(DOMAIN_DNS_SETUP, new HsDomainDnsSetupHostingAssetValidator());
         register(DOMAIN_HTTP_SETUP, new HsDomainHttpSetupHostingAssetValidator());
+        register(DOMAIN_SMTP_SETUP, new HsDomainSmtpSetupHostingAssetValidator());
+        register(DOMAIN_MBOX_SETUP, new HsDomainMboxSetupHostingAssetValidator());
+        register(EMAIL_ADDRESS, new HsEMailAddressHostingAssetValidator());
     }
 
     private static void register(final Enum<HsHostingAssetType> type, final HsEntityValidator<HsHostingAssetEntity> validator) {

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainDnsSetupHostingAssetValidator.java

@@ -60,7 +60,7 @@ class HsDomainDnsSetupHostingAssetValidator extends HostingAssetEntityValidator
 
     @Override
     protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
-        return  Pattern.compile("^" + assetEntity.getParentAsset().getIdentifier() + Pattern.quote(IDENTIFIER_SUFFIX) + "$");
+        return  Pattern.compile("^" + Pattern.quote(assetEntity.getParentAsset().getIdentifier() + IDENTIFIER_SUFFIX) + "$");
     }
 
     @Override

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainHttpSetupHostingAssetValidator.java

@@ -43,7 +43,7 @@ class HsDomainHttpSetupHostingAssetValidator extends HostingAssetEntityValidator
 
     @Override
     protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
-        return  Pattern.compile("^" + assetEntity.getParentAsset().getIdentifier() + Pattern.quote(IDENTIFIER_SUFFIX) + "$");
+        return  Pattern.compile("^" + Pattern.quote(assetEntity.getParentAsset().getIdentifier() + IDENTIFIER_SUFFIX) + "$");
     }
 
     @Override

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainMboxSetupHostingAssetValidator.java

@@ -0,0 +1,34 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+
+import java.util.regex.Pattern;
+
+import static java.util.Optional.ofNullable;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_MBOX_SETUP;
+
+class HsDomainMboxSetupHostingAssetValidator extends HostingAssetEntityValidator {
+
+    public static final String IDENTIFIER_SUFFIX = "|MBOX";
+
+    HsDomainMboxSetupHostingAssetValidator() {
+        super(
+                DOMAIN_MBOX_SETUP,
+                AlarmContact.isOptional(),
+
+                NO_EXTRA_PROPERTIES);
+    }
+
+    @Override
+    protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
+        return  Pattern.compile("^" + Pattern.quote(assetEntity.getParentAsset().getIdentifier() + IDENTIFIER_SUFFIX) + "$");
+    }
+
+    @Override
+    public void preprocessEntity(final HsHostingAssetEntity entity) {
+        super.preprocessEntity(entity);
+        if (entity.getIdentifier() == null) {
+            ofNullable(entity.getParentAsset()).ifPresent(pa -> entity.setIdentifier(pa.getIdentifier() + IDENTIFIER_SUFFIX));
+        }
+    }
+}

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainSetupHostingAssetValidator.java

@@ -43,7 +43,6 @@ class HsDomainSetupHostingAssetValidator extends HostingAssetEntityValidator {
         //  - user has Admin/Agent-role for all its sub-domains and the direct parent-Domain which are set up at at Hostsharing
         //  - domain has DNS zone with TXT record approval
         //  - parent-domain has DNS zone with TXT record approval
-        //  - dom
         //
         // TXT-Record check:
         // new InitialDirContext().getAttributes("dns:_netblocks.google.com", new String[] { "TXT"}).get("TXT").getAll();

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainSmtpSetupHostingAssetValidator.java

@@ -0,0 +1,34 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+
+import java.util.regex.Pattern;
+
+import static java.util.Optional.ofNullable;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SMTP_SETUP;
+
+class HsDomainSmtpSetupHostingAssetValidator extends HostingAssetEntityValidator {
+
+    public static final String IDENTIFIER_SUFFIX = "|SMTP";
+
+    HsDomainSmtpSetupHostingAssetValidator() {
+        super(
+                DOMAIN_SMTP_SETUP,
+                AlarmContact.isOptional(),
+
+                NO_EXTRA_PROPERTIES);
+    }
+
+    @Override
+    protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
+        return  Pattern.compile("^" + Pattern.quote(assetEntity.getParentAsset().getIdentifier() + IDENTIFIER_SUFFIX) + "$");
+    }
+
+    @Override
+    public void preprocessEntity(final HsHostingAssetEntity entity) {
+        super.preprocessEntity(entity);
+        if (entity.getIdentifier() == null) {
+            ofNullable(entity.getParentAsset()).ifPresent(pa -> entity.setIdentifier(pa.getIdentifier() + IDENTIFIER_SUFFIX));
+        }
+    }
+}

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsEMailAddressHostingAssetValidator.java

@@ -0,0 +1,51 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType;
+
+import java.util.regex.Pattern;
+
+import static java.util.Optional.ofNullable;
+import static net.hostsharing.hsadminng.hs.validation.ArrayProperty.arrayOf;
+import static net.hostsharing.hsadminng.hs.validation.StringProperty.stringProperty;
+
+class HsEMailAddressHostingAssetValidator extends HostingAssetEntityValidator {
+
+    private static final String UNIX_USER_REGEX = "^[a-z][a-z0-9]{2}[0-9]{2}(-[a-z0-9]+)?$"; // also accepts legacy pac-names
+    private static final String EMAIL_ADDRESS_LOCAL_PART_REGEX = "[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+"; // RFC 5322
+    private static final String EMAIL_ADDRESS_DOMAIN_PART_REGEX = "[a-zA-Z0-9.-]+";
+    private static final String EMAIL_ADDRESS_FULL_REGEX = "^" + EMAIL_ADDRESS_LOCAL_PART_REGEX + "@" + EMAIL_ADDRESS_DOMAIN_PART_REGEX + "$";
+    public static final int EMAIL_ADDRESS_MAX_LENGTH = 320; // according to RFC 5321 and RFC 5322
+
+    HsEMailAddressHostingAssetValidator() {
+        super(  HsHostingAssetType.EMAIL_ADDRESS,
+                AlarmContact.isOptional(),
+
+                stringProperty("local-part").matchesRegEx("^" + EMAIL_ADDRESS_LOCAL_PART_REGEX + "$").required(),
+                stringProperty("sub-domain").matchesRegEx("^" + EMAIL_ADDRESS_LOCAL_PART_REGEX + "$").optional(),
+                arrayOf(
+                        stringProperty("target").maxLength(EMAIL_ADDRESS_MAX_LENGTH).matchesRegEx(UNIX_USER_REGEX, EMAIL_ADDRESS_FULL_REGEX)
+                ).required().minLength(1));
+    }
+
+    @Override
+    public void preprocessEntity(final HsHostingAssetEntity entity) {
+        super.preprocessEntity(entity);
+        super.preprocessEntity(entity);
+        if (entity.getIdentifier() == null) {
+            entity.setIdentifier(combineIdentifier(entity));
+        }
+    }
+
+    @Override
+    protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
+        return Pattern.compile("^"+ Pattern.quote(combineIdentifier(assetEntity)) + "$");
+    }
+
+    private static String combineIdentifier(final HsHostingAssetEntity emailAddressAssetEntity) {
+        return emailAddressAssetEntity.getDirectValue("local-part", String.class) +
+                ofNullable(emailAddressAssetEntity.getDirectValue("sub-domain", String.class)).map(s -> "." + s).orElse("") +
+                "@" +
+                emailAddressAssetEntity.getParentAsset().getIdentifier();
+    }
+}

src/main/resources/api-definition/hs-hosting/hs-hosting-asset-schemas.yaml

@@ -13,7 +13,8 @@ components:
                 - DOMAIN_SETUP
                 - DOMAIN_DNS_SETUP
                 - DOMAIN_HTTP_SETUP
-                - DOMAIN_EMAIL_SETUP
+                - DOMAIN_SMTP_SETUP
+                - DOMAIN_MBOX_SETUP
                 - EMAIL_ALIAS
                 - EMAIL_ADDRESS
                 - PGSQL_USER

src/main/resources/db/changelog/7-hs-hosting/701-hosting-asset/7010-hs-hosting-asset.sql

@@ -12,7 +12,8 @@ create type HsHostingAssetType as enum (
     'DOMAIN_SETUP',
     'DOMAIN_DNS_SETUP',
     'DOMAIN_HTTP_SETUP',
-    'DOMAIN_EMAIL_SETUP',
+    'DOMAIN_SMTP_SETUP',
+    'DOMAIN_MBOX_SETUP',
     'EMAIL_ALIAS',
     'EMAIL_ADDRESS',
     'PGSQL_USER',
@@ -64,12 +65,13 @@ begin
         when 'MANAGED_SERVER' then null
         when 'MANAGED_WEBSPACE' then 'MANAGED_SERVER'
         when 'UNIX_USER' then 'MANAGED_WEBSPACE'
+        when 'EMAIL_ALIAS' then 'MANAGED_WEBSPACE'
         when 'DOMAIN_SETUP' then null
         when 'DOMAIN_DNS_SETUP' then 'DOMAIN_SETUP'
         when 'DOMAIN_HTTP_SETUP' then 'DOMAIN_SETUP'
-        when 'DOMAIN_EMAIL_SETUP' then 'DOMAIN_SETUP'
+        when 'DOMAIN_SMTP_SETUP' then 'DOMAIN_SETUP'
-        when 'EMAIL_ALIAS' then 'MANAGED_WEBSPACE'
+        when 'DOMAIN_MBOX_SETUP' then 'DOMAIN_SETUP'
-        when 'EMAIL_ADDRESS' then 'DOMAIN_EMAIL_SETUP'
+        when 'EMAIL_ADDRESS' then 'DOMAIN_MBOX_SETUP'
         when 'PGSQL_USER' then 'MANAGED_WEBSPACE'
         when 'PGSQL_DATABASE' then 'MANAGED_WEBSPACE'
         when 'MARIADB_USER' then 'MANAGED_WEBSPACE'

src/main/resources/db/changelog/7-hs-hosting/701-hosting-asset/7018-hs-hosting-asset-test-data.sql

@@ -14,16 +14,17 @@ declare
     currentTask                         varchar;
     relatedProject                      hs_booking_project;
     relatedDebitor                      hs_office_debitor;
-    relatedPrivateCloudBookingItem      hs_booking_item;
+    privateCloudBI                      hs_booking_item;
-    relatedManagedServerBookingItem     hs_booking_item;
+    managedServerBI                     hs_booking_item;
-    relatedCloudServerBookingItem       hs_booking_item;
+    cloudServerBI                       hs_booking_item;
-    relatedManagedWebspaceBookingItem   hs_booking_item;
+    managedWebspaceBI                   hs_booking_item;
     debitorNumberSuffix                 varchar;
     defaultPrefix                       varchar;
     managedServerUuid                   uuid;
     managedWebspaceUuid                 uuid;
     webUnixUserUuid                     uuid;
     domainSetupUuid                     uuid;
+    domainMBoxSetupUuid                 uuid;
 begin
     currentTask := 'creating hosting-asset test-data ' || givenProjectCaption;
     call defineContext(currentTask, null, 'superuser-alex@hostsharing.net', 'global#global:ADMIN');
@@ -39,47 +40,51 @@ begin
                      where debitor.uuid = relatedProject.debitorUuid;
     assert relatedDebitor.uuid is not null, 'relatedDebitor for "' || givenProjectCaption || '" must not be null';
 
-    select item.* into relatedPrivateCloudBookingItem
+    select item.* into privateCloudBI
         from hs_booking_item item
        where item.projectUuid = relatedProject.uuid
           and item.type = 'PRIVATE_CLOUD';
-    assert relatedPrivateCloudBookingItem.uuid is not null, 'relatedPrivateCloudBookingItem for "' || givenProjectCaption|| '" must not be null';
+    assert privateCloudBI.uuid is not null, 'relatedPrivateCloudBookingItem for "' || givenProjectCaption|| '" must not be null';
 
-    select item.* into relatedManagedServerBookingItem
+    select item.* into managedServerBI
           from hs_booking_item item
           where item.projectUuid = relatedProject.uuid
             and item.type = 'MANAGED_SERVER';
-    assert relatedManagedServerBookingItem.uuid is not null, 'relatedManagedServerBookingItem for "' || givenProjectCaption|| '" must not be null';
+    assert managedServerBI.uuid is not null, 'relatedManagedServerBookingItem for "' || givenProjectCaption|| '" must not be null';
 
-    select item.* into relatedCloudServerBookingItem
+    select item.* into cloudServerBI
           from hs_booking_item item
-          where item.parentItemuuid = relatedPrivateCloudBookingItem.uuid
+          where item.parentItemuuid = privateCloudBI.uuid
             and item.type = 'CLOUD_SERVER';
-    assert relatedCloudServerBookingItem.uuid is not null, 'relatedCloudServerBookingItem for "' || givenProjectCaption|| '" must not be null';
+    assert cloudServerBI.uuid is not null, 'relatedCloudServerBookingItem for "' || givenProjectCaption|| '" must not be null';
 
-    select item.* into relatedManagedWebspaceBookingItem
+    select item.* into managedWebspaceBI
           from hs_booking_item item
           where item.projectUuid = relatedProject.uuid
             and item.type = 'MANAGED_WEBSPACE';
-    assert relatedManagedWebspaceBookingItem.uuid is not null, 'relatedManagedWebspaceBookingItem for "' || givenProjectCaption|| '" must not be null';
+    assert managedWebspaceBI.uuid is not null, 'relatedManagedWebspaceBookingItem for "' || givenProjectCaption|| '" must not be null';
 
     select uuid_generate_v4() into managedServerUuid;
     select uuid_generate_v4() into managedWebspaceUuid;
     select uuid_generate_v4() into webUnixUserUuid;
     select uuid_generate_v4() into domainSetupUuid;
+    select uuid_generate_v4() into domainMBoxSetupUuid;
     debitorNumberSuffix := relatedDebitor.debitorNumberSuffix;
     defaultPrefix := relatedDebitor.defaultPrefix;
 
     insert into hs_hosting_asset
            (uuid,                   bookingitemuuid,        type,                parentAssetUuid,     assignedToAssetUuid,   identifier,                                    caption,                     config)
-    values (managedServerUuid,   relatedManagedServerBookingItem.uuid,   'MANAGED_SERVER',    null,                null,                  'vm10' || debitorNumberSuffix,        'some ManagedServer',        '{ "monit_max_cpu_usage": 90, "monit_max_ram_usage": 80, "monit_max_ssd_usage": 70 }'::jsonb),
+           values (managedServerUuid,      managedServerBI.uuid,   'MANAGED_SERVER',    null,                null,                  'vm10' || debitorNumberSuffix,                 'some ManagedServer',        '{ "monit_max_cpu_usage": 90, "monit_max_ram_usage": 80, "monit_max_ssd_usage": 70 }'::jsonb),
-           (uuid_generate_v4(),  relatedCloudServerBookingItem.uuid,     'CLOUD_SERVER',      null,                null,                  'vm20' || debitorNumberSuffix,        'another CloudServer',       '{}'::jsonb),
+                  (uuid_generate_v4(),     cloudServerBI.uuid,     'CLOUD_SERVER',      null,                null,                  'vm20' || debitorNumberSuffix,                 'another CloudServer',       '{}'::jsonb),
-           (managedWebspaceUuid, relatedManagedWebspaceBookingItem.uuid, 'MANAGED_WEBSPACE',  managedServerUuid,   null,                  defaultPrefix || '01',                'some Webspace',             '{}'::jsonb),
+                  (managedWebspaceUuid,    managedWebspaceBI.uuid, 'MANAGED_WEBSPACE',  managedServerUuid,   null,                  defaultPrefix || '01',                         'some Webspace',             '{}'::jsonb),
                   (uuid_generate_v4(),     null,                   'EMAIL_ALIAS',       managedWebspaceUuid, null,                  defaultPrefix || '01-web',                     'some E-Mail-Alias',         '{ "target": [ "office@example.org", "archive@example.com" ] }'::jsonb),
                   (webUnixUserUuid,        null,                   'UNIX_USER',         managedWebspaceUuid, null,                  defaultPrefix || '01-web',                     'some UnixUser for Website', '{ "SSD-soft-quota": "128", "SSD-hard-quota": "256", "HDD-soft-quota": "512", "HDD-hard-quota": "1024"}'::jsonb),
                   (domainSetupUuid,        null,                   'DOMAIN_SETUP',      null,                null,                  defaultPrefix || '.example.org',               'some Domain-Setup',         '{}'::jsonb),
                   (uuid_generate_v4(),     null,                   'DOMAIN_DNS_SETUP',  domainSetupUuid,     null,                  defaultPrefix || '.example.org|DNS',           'some Domain-DNS-Setup',     '{}'::jsonb),
-           (uuid_generate_v4(),  null,                                   'DOMAIN_HTTP_SETUP', domainSetupUuid,     webUnixUserUuid,       defaultPrefix || '.example.org|HTTP', 'some Domain-HTTP-Setup',    '{ "option-htdocsfallback": true, "use-fcgiphpbin": "/usr/lib/cgi-bin/php", "validsubdomainnames": "*"}'::jsonb);
+                  (uuid_generate_v4(),     null,                   'DOMAIN_HTTP_SETUP', domainSetupUuid,     webUnixUserUuid,       defaultPrefix || '.example.org|HTTP',          'some Domain-HTTP-Setup',    '{ "option-htdocsfallback": true, "use-fcgiphpbin": "/usr/lib/cgi-bin/php", "validsubdomainnames": "*"}'::jsonb),
+                  (uuid_generate_v4(),     null,                   'DOMAIN_SMTP_SETUP', domainSetupUuid,     managedWebspaceUuid,   defaultPrefix || '.example.org|DNS',           'some Domain-SMPT-Setup',    '{}'::jsonb),
+                  (domainMBoxSetupUuid,    null,                   'DOMAIN_MBOX_SETUP', domainSetupUuid,     managedWebspaceUuid,   defaultPrefix || '.example.org|DNS',           'some Domain-MBOX-Setup',    '{}'::jsonb),
+                  (uuid_generate_v4(),    null,                    'EMAIL_ADDRESS',     domainMBoxSetupUuid, null,                  'test@' || defaultPrefix || '.example.org',    'some E-Mail-Address',       '{}'::jsonb);
 end; $$;
 --//
 

src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedServerBookingItemValidatorUnitTest.java

@@ -152,7 +152,7 @@ class HsManagedServerBookingItemValidatorUnitTest {
                                         "xyz00_%c%c",
                                         2, HsHostingAssetType.MARIADB_DATABASE
                                 ),
-                                generateDomainEmailSetupsWithEMailAddresses(26, HsHostingAssetType.DOMAIN_EMAIL_MAILBOX_SETUP,
+                                generateDomainEmailSetupsWithEMailAddresses(26, HsHostingAssetType.DOMAIN_MBOX_SETUP,
                                         "%c%c.example.com",
                                         10, HsHostingAssetType.EMAIL_ADDRESS
                                 )

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerRestTest.java

@@ -251,7 +251,7 @@ public class HsHostingAssetControllerRestTest {
                 List.of(
                         HsHostingAssetEntity.builder()
                                 .type(HsHostingAssetType.DOMAIN_HTTP_SETUP)
-                                .identifier("example.org")
+                                .identifier("example.org|HTTP")
                                 .caption("some fake Domain-HTTP-Setup")
                                 .config(Map.ofEntries(
                                         entry("htdocsfallback", false),
@@ -276,7 +276,7 @@ public class HsHostingAssetControllerRestTest {
                     [
                         {
                             "type": "DOMAIN_HTTP_SETUP",
-                            "identifier": "example.org",
+                            "identifier": "example.org|HTTP",
                             "caption": "some fake Domain-HTTP-Setup",
                             "alarmContact": null,
                             "config": {
@@ -299,6 +299,70 @@ public class HsHostingAssetControllerRestTest {
                             }
                         }
                     ]
+                """),
+        DOMAIN_SMTP_SETUP(
+                List.of(
+                        HsHostingAssetEntity.builder()
+                                .type(HsHostingAssetType.DOMAIN_SMTP_SETUP)
+                                .identifier("example.org|SMTP")
+                                .caption("some fake Domain-SMTP-Setup")
+                                .build()),
+                """
+                    [
+                        {
+                            "type": "DOMAIN_SMTP_SETUP",
+                            "identifier": "example.org|SMTP",
+                            "caption": "some fake Domain-SMTP-Setup",
+                            "alarmContact": null,
+                            "config": {}
+                        }
+                    ]
+                """),
+        DOMAIN_MBOX_SETUP(
+                List.of(
+                        HsHostingAssetEntity.builder()
+                                .type(HsHostingAssetType.DOMAIN_MBOX_SETUP)
+                                .identifier("example.org|MBOX")
+                                .caption("some fake Domain-MBOX-Setup")
+                                .build()),
+                """
+                    [
+                        {
+                            "type": "DOMAIN_MBOX_SETUP",
+                            "identifier": "example.org|MBOX",
+                            "caption": "some fake Domain-MBOX-Setup",
+                            "alarmContact": null,
+                            "config": {}
+                        }
+                    ]
+                """),
+        EMAIL_ADDRESS(
+                List.of(
+                        HsHostingAssetEntity.builder()
+                                .type(HsHostingAssetType.EMAIL_ADDRESS)
+                                .parentAsset(HsHostingAssetEntity.builder()
+                                        .type(HsHostingAssetType.DOMAIN_MBOX_SETUP)
+                                        .identifier("example.org|MBOX")
+                                        .caption("some fake Domain-MBOX-Setup")
+                                        .build())
+                                .identifier("office@example.org")
+                                .caption("some fake EMail-Address")
+                                .config(Map.ofEntries(
+                                        entry("target", Array.of("xyz00", "xyz00-abc", "office@example.com"))
+                                ))
+                                .build()),
+                """
+                    [
+                        {
+                            "type": "EMAIL_ADDRESS",
+                            "identifier": "office@example.org",
+                            "caption": "some fake EMail-Address",
+                            "alarmContact": null,
+                            "config": {
+                                "target": ["xyz00","xyz00-abc","office@example.com"]
+                            }
+                        }
+                    ]
                 """);
 
         final HsHostingAssetType assetType;

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetPropsControllerAcceptanceTest.java

@@ -38,7 +38,10 @@ class HsHostingAssetPropsControllerAcceptanceTest {
                             "EMAIL_ALIAS",
                             "DOMAIN_SETUP",
                             "DOMAIN_DNS_SETUP",
-                            "DOMAIN_HTTP_SETUP"
+                            "DOMAIN_HTTP_SETUP",
+                            "DOMAIN_SMTP_SETUP",
+                            "DOMAIN_MBOX_SETUP",
+                            "EMAIL_ADDRESS"
                         ]
                         """));
         // @formatter:on

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetTypeUnitTest.java

@@ -25,8 +25,6 @@ class HsHostingAssetTypeUnitTest {
                     entity BI_CLOUD_SERVER
                     entity BI_MANAGED_SERVER
                     entity BI_MANAGED_WEBSPACE
-                    entity BI_DOMAIN_DNS_SETUP
-                    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
                 }
 
                 package Hosting #feb28c{
@@ -34,8 +32,8 @@ class HsHostingAssetTypeUnitTest {
                         entity HA_DOMAIN_SETUP
                         entity HA_DOMAIN_DNS_SETUP
                         entity HA_DOMAIN_HTTP_SETUP
-                        entity HA_DOMAIN_EMAIL_SUBMISSION_SETUP
+                        entity HA_DOMAIN_SMTP_SETUP
-                        entity HA_DOMAIN_EMAIL_MAILBOX_SETUP
+                        entity HA_DOMAIN_MBOX_SETUP
                         entity HA_EMAIL_ADDRESS
                     }
                 
@@ -62,16 +60,17 @@ class HsHostingAssetTypeUnitTest {
                 HA_MANAGED_WEBSPACE *==> BI_MANAGED_WEBSPACE
                 HA_MANAGED_WEBSPACE o..> HA_MANAGED_SERVER
                 HA_UNIX_USER *==> HA_MANAGED_WEBSPACE
+                HA_EMAIL_ALIAS *==> HA_MANAGED_WEBSPACE
                 HA_DOMAIN_SETUP o..> HA_DOMAIN_SETUP
                 HA_DOMAIN_DNS_SETUP *==> HA_DOMAIN_SETUP
+                HA_DOMAIN_DNS_SETUP o..> HA_MANAGED_WEBSPACE
                 HA_DOMAIN_HTTP_SETUP *==> HA_DOMAIN_SETUP
                 HA_DOMAIN_HTTP_SETUP o..> HA_UNIX_USER
-                HA_DOMAIN_EMAIL_SUBMISSION_SETUP *==> HA_DOMAIN_SETUP
+                HA_DOMAIN_SMTP_SETUP *==> HA_DOMAIN_SETUP
-                HA_DOMAIN_EMAIL_SUBMISSION_SETUP o..> HA_MANAGED_WEBSPACE
+                HA_DOMAIN_SMTP_SETUP o..> HA_MANAGED_WEBSPACE
-                HA_DOMAIN_EMAIL_MAILBOX_SETUP *==> HA_DOMAIN_SETUP
+                HA_DOMAIN_MBOX_SETUP *==> HA_DOMAIN_SETUP
-                HA_DOMAIN_EMAIL_MAILBOX_SETUP o..> HA_MANAGED_WEBSPACE
+                HA_DOMAIN_MBOX_SETUP o..> HA_MANAGED_WEBSPACE
-                HA_EMAIL_ALIAS *==> HA_MANAGED_WEBSPACE
+                HA_EMAIL_ADDRESS *==> HA_DOMAIN_MBOX_SETUP
-                HA_EMAIL_ADDRESS *==> HA_DOMAIN_EMAIL_MAILBOX_SETUP
                 HA_IP_NUMBER o..> HA_CLOUD_SERVER
                 HA_IP_NUMBER o..> HA_MANAGED_SERVER
                 HA_IP_NUMBER o..> HA_MANAGED_WEBSPACE
@@ -96,8 +95,6 @@ class HsHostingAssetTypeUnitTest {
                     entity BI_CLOUD_SERVER
                     entity BI_MANAGED_SERVER
                     entity BI_MANAGED_WEBSPACE
-                    entity BI_DOMAIN_DNS_SETUP
-                    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
                 }
 
                 package Hosting #feb28c{
@@ -160,8 +157,6 @@ class HsHostingAssetTypeUnitTest {
                     entity BI_CLOUD_SERVER
                     entity BI_MANAGED_SERVER
                     entity BI_MANAGED_WEBSPACE
-                    entity BI_DOMAIN_DNS_SETUP
-                    entity BI_DOMAIN_EMAIL_SUBMISSION_SETUP
                 }
 
                 package Hosting #feb28c{

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HostingAssetEntityValidatorRegistryUnitTest.java

@@ -36,7 +36,10 @@ class HostingAssetEntityValidatorRegistryUnitTest {
                 HsHostingAssetType.EMAIL_ALIAS,
                 HsHostingAssetType.DOMAIN_SETUP,
                 HsHostingAssetType.DOMAIN_DNS_SETUP,
-                HsHostingAssetType.DOMAIN_HTTP_SETUP
+                HsHostingAssetType.DOMAIN_HTTP_SETUP,
+                HsHostingAssetType.DOMAIN_SMTP_SETUP,
+                HsHostingAssetType.DOMAIN_MBOX_SETUP,
+                HsHostingAssetType.EMAIL_ADDRESS
         );
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainDnsSetupHostingAssetValidatorUnitTest.java

@@ -12,6 +12,7 @@ import java.util.Map;
 import static java.util.Map.entry;
 import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_DNS_SETUP;
 import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.TestHsHostingAssetEntities.TEST_MANAGED_WEBSPACE_HOSTING_ASSET;
 import static net.hostsharing.hsadminng.hs.hosting.asset.validators.HsDomainDnsSetupHostingAssetValidator.RR_COMMENT;
 import static net.hostsharing.hsadminng.hs.hosting.asset.validators.HsDomainDnsSetupHostingAssetValidator.RR_RECORD_DATA;
 import static net.hostsharing.hsadminng.hs.hosting.asset.validators.HsDomainDnsSetupHostingAssetValidator.RR_RECORD_TYPE;
@@ -31,6 +32,7 @@ class HsDomainDnsSetupHostingAssetValidatorUnitTest {
         return HsHostingAssetEntity.builder()
                 .type(DOMAIN_DNS_SETUP)
                 .parentAsset(validDomainSetupEntity)
+                .assignedToAsset(TEST_MANAGED_WEBSPACE_HOSTING_ASSET)
                 .identifier("example.org|DNS")
                 .config(Map.ofEntries(
                         entry("user-RR", Array.of(
@@ -95,7 +97,7 @@ class HsDomainDnsSetupHostingAssetValidatorUnitTest {
 
         // then
         assertThat(result).containsExactly(
-                "'identifier' expected to match '^example.org\\Q|DNS\\E$', but is 'example.org'"
+                "'identifier' expected to match '^\\Qexample.org|DNS\\E$', but is 'example.org'"
         );
     }
 
@@ -129,7 +131,7 @@ class HsDomainDnsSetupHostingAssetValidatorUnitTest {
         assertThat(result).containsExactlyInAnyOrder(
                 "'DOMAIN_DNS_SETUP:example.org|DNS.bookingItem' must be null but is of type CLOUD_SERVER",
                 "'DOMAIN_DNS_SETUP:example.org|DNS.parentAsset' must be of type DOMAIN_SETUP but is null",
-                "'DOMAIN_DNS_SETUP:example.org|DNS.assignedToAsset' must be null but is of type DOMAIN_SETUP");
+                "'DOMAIN_DNS_SETUP:example.org|DNS.assignedToAsset' must be of type MANAGED_WEBSPACE but is of type DOMAIN_SETUP");
     }
 
     @Test

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainHttpSetupHostingAssetValidatorUnitTest.java

@@ -87,7 +87,7 @@ class HsDomainHttpSetupHostingAssetValidatorUnitTest {
 
         // then
         assertThat(result).containsExactly(
-                "'identifier' expected to match '^example.org\\Q|HTTP\\E$', but is 'example.org'"
+                "'identifier' expected to match '^\\Qexample.org|HTTP\\E$', but is 'example.org'"
         );
     }
 

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainMboxHostingAssetValidatorUnitTest.java

@@ -0,0 +1,133 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemEntity;
+import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemType;
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity.HsHostingAssetEntityBuilder;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static java.util.Map.entry;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_MBOX_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.MANAGED_WEBSPACE;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class HsDomainMboxHostingAssetValidatorUnitTest {
+
+    static final HsHostingAssetEntity validDomainSetupEntity = HsHostingAssetEntity.builder()
+                .type(DOMAIN_SETUP)
+                .identifier("example.org")
+                .build();
+
+    static HsHostingAssetEntityBuilder validEntityBuilder() {
+        return HsHostingAssetEntity.builder()
+                .type(DOMAIN_MBOX_SETUP)
+                .parentAsset(validDomainSetupEntity)
+                .assignedToAsset(HsHostingAssetEntity.builder().type(MANAGED_WEBSPACE).build())
+                .identifier("example.org|MBOX");
+    }
+
+    @Test
+    void containsExpectedProperties() {
+        // when
+        final var validator = HostingAssetEntityValidatorRegistry.forType(DOMAIN_MBOX_SETUP);
+
+        // then
+        assertThat(validator.properties()).map(Map::toString).isEmpty();
+    }
+
+    @Test
+    void preprocessesTakesIdentifierFromParent() {
+        // given
+        final var givenEntity = validEntityBuilder().build();
+        assertThat(givenEntity.getParentAsset().getIdentifier()).as("precondition failed").isEqualTo("example.org");
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        validator.preprocessEntity(givenEntity);
+
+        // then
+        assertThat(givenEntity.getIdentifier()).isEqualTo("example.org|MBOX");
+    }
+
+    @Test
+    void rejectsInvalidIdentifier() {
+        // given
+        final var givenEntity = validEntityBuilder().identifier("example.org").build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(result).containsExactly(
+                "'identifier' expected to match '^\\Qexample.org|MBOX\\E$', but is 'example.org'"
+        );
+    }
+
+    @Test
+    void acceptsValidIdentifier() {
+        // given
+        final var givenEntity = validEntityBuilder().identifier(validDomainSetupEntity.getIdentifier()+"|MBOX").build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(result).isEmpty();
+    }
+
+    @Test
+    void rejectsInvalidReferencedEntities() {
+        // given
+        final var mangedServerHostingAssetEntity = validEntityBuilder()
+                .bookingItem(HsBookingItemEntity.builder().type(HsBookingItemType.CLOUD_SERVER).build())
+                .parentAsset(HsHostingAssetEntity.builder().type(MANAGED_WEBSPACE).build())
+                .assignedToAsset(null)
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(mangedServerHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(mangedServerHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'DOMAIN_MBOX_SETUP:example.org|MBOX.bookingItem' must be null but is of type CLOUD_SERVER",
+                "'DOMAIN_MBOX_SETUP:example.org|MBOX.parentAsset' must be of type DOMAIN_SETUP but is of type MANAGED_WEBSPACE",
+                "'DOMAIN_MBOX_SETUP:example.org|MBOX.assignedToAsset' must be of type MANAGED_WEBSPACE but is null");
+    }
+
+    @Test
+    void acceptsValidEntity() {
+        // given
+        final var givenEntity = validEntityBuilder().build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var errors = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(errors).isEmpty();
+    }
+
+    @Test
+    void rejectsInvalidProperties() {
+        // given
+        final var mangedServerHostingAssetEntity = validEntityBuilder()
+                .config(Map.ofEntries(
+                        entry("any", "false")
+                ))
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(mangedServerHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(mangedServerHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'DOMAIN_MBOX_SETUP:example.org|MBOX.config.any' is not expected but is set to 'false'");
+    }
+}

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainSmtpSetupHostingAssetValidatorUnitTest.java

@@ -0,0 +1,133 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemEntity;
+import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemType;
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity.HsHostingAssetEntityBuilder;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static java.util.Map.entry;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SMTP_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.MANAGED_WEBSPACE;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class HsDomainSmtpSetupHostingAssetValidatorUnitTest {
+
+    static final HsHostingAssetEntity validDomainSetupEntity = HsHostingAssetEntity.builder()
+                .type(DOMAIN_SETUP)
+                .identifier("example.org")
+                .build();
+
+    static HsHostingAssetEntityBuilder validEntityBuilder() {
+        return HsHostingAssetEntity.builder()
+                .type(DOMAIN_SMTP_SETUP)
+                .parentAsset(validDomainSetupEntity)
+                .assignedToAsset(HsHostingAssetEntity.builder().type(MANAGED_WEBSPACE).build())
+                .identifier("example.org|SMTP");
+    }
+
+    @Test
+    void containsExpectedProperties() {
+        // when
+        final var validator = HostingAssetEntityValidatorRegistry.forType(DOMAIN_SMTP_SETUP);
+
+        // then
+        assertThat(validator.properties()).map(Map::toString).isEmpty();
+    }
+
+    @Test
+    void preprocessesTakesIdentifierFromParent() {
+        // given
+        final var givenEntity = validEntityBuilder().build();
+        assertThat(givenEntity.getParentAsset().getIdentifier()).as("precondition failed").isEqualTo("example.org");
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        validator.preprocessEntity(givenEntity);
+
+        // then
+        assertThat(givenEntity.getIdentifier()).isEqualTo("example.org|SMTP");
+    }
+
+    @Test
+    void rejectsInvalidIdentifier() {
+        // given
+        final var givenEntity = validEntityBuilder().identifier("example.org").build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(result).containsExactly(
+                "'identifier' expected to match '^\\Qexample.org|SMTP\\E$', but is 'example.org'"
+        );
+    }
+
+    @Test
+    void acceptsValidIdentifier() {
+        // given
+        final var givenEntity = validEntityBuilder().identifier(validDomainSetupEntity.getIdentifier()+"|SMTP").build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(result).isEmpty();
+    }
+
+    @Test
+    void rejectsInvalidReferencedEntities() {
+        // given
+        final var mangedServerHostingAssetEntity = validEntityBuilder()
+                .bookingItem(HsBookingItemEntity.builder().type(HsBookingItemType.CLOUD_SERVER).build())
+                .parentAsset(HsHostingAssetEntity.builder().type(MANAGED_WEBSPACE).build())
+                .assignedToAsset(null)
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(mangedServerHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(mangedServerHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'DOMAIN_SMTP_SETUP:example.org|SMTP.bookingItem' must be null but is of type CLOUD_SERVER",
+                "'DOMAIN_SMTP_SETUP:example.org|SMTP.parentAsset' must be of type DOMAIN_SETUP but is of type MANAGED_WEBSPACE",
+                "'DOMAIN_SMTP_SETUP:example.org|SMTP.assignedToAsset' must be of type MANAGED_WEBSPACE but is null");
+    }
+
+    @Test
+    void acceptsValidEntity() {
+        // given
+        final var givenEntity = validEntityBuilder().build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(givenEntity.getType());
+
+        // when
+        final var errors = validator.validateEntity(givenEntity);
+
+        // then
+        assertThat(errors).isEmpty();
+    }
+
+    @Test
+    void rejectsInvalidProperties() {
+        // given
+        final var mangedServerHostingAssetEntity = validEntityBuilder()
+                .config(Map.ofEntries(
+                        entry("any", "false")
+                ))
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(mangedServerHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(mangedServerHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'DOMAIN_SMTP_SETUP:example.org|SMTP.config.any' is not expected but is set to 'false'");
+    }
+}

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsEMailAddressHostingAssetValidatorUnitTest.java

@@ -0,0 +1,114 @@
+package net.hostsharing.hsadminng.hs.hosting.asset.validators;
+
+import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetEntity;
+import net.hostsharing.hsadminng.mapper.Array;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static java.util.Map.entry;
+import static net.hostsharing.hsadminng.hs.booking.item.TestHsBookingItem.TEST_MANAGED_SERVER_BOOKING_ITEM;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_MBOX_SETUP;
+import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.EMAIL_ADDRESS;
+import static net.hostsharing.hsadminng.hs.hosting.asset.TestHsHostingAssetEntities.TEST_MANAGED_SERVER_HOSTING_ASSET;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class HsEMailAddressHostingAssetValidatorUnitTest {
+
+    final static HsHostingAssetEntity domainMboxetup = HsHostingAssetEntity.builder()
+            .type(DOMAIN_MBOX_SETUP)
+            .identifier("example.org")
+            .build();
+    static HsHostingAssetEntity.HsHostingAssetEntityBuilder validEntityBuilder() {
+            return HsHostingAssetEntity.builder()
+                .type(EMAIL_ADDRESS)
+                .parentAsset(domainMboxetup)
+                .identifier("test@example.org")
+                .config(Map.ofEntries(
+                        entry("local-part", "test"),
+                        entry("target", Array.of("xyz00", "xyz00-abc", "office@example.com"))
+                ));
+    }
+
+    @Test
+    void containsAllValidations() {
+        // when
+        final var validator = HostingAssetEntityValidatorRegistry.forType(EMAIL_ADDRESS);
+
+        // then
+        assertThat(validator.properties()).map(Map::toString).containsExactlyInAnyOrder(
+                "{type=string, propertyName=local-part, matchesRegEx=[^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+$], required=true}",
+                "{type=string, propertyName=sub-domain, matchesRegEx=[^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+$]}",
+                "{type=string[], propertyName=target, elementsOf={type=string, propertyName=target, matchesRegEx=[^[a-z][a-z0-9]{2}[0-9]{2}(-[a-z0-9]+)?$, ^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+@[a-zA-Z0-9.-]+$], maxLength=320}, required=true, minLength=1}");
+    }
+
+    @Test
+    void acceptsValidEntity() {
+        // given
+        final var emailAddressHostingAssetEntity = validEntityBuilder().build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(emailAddressHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(emailAddressHostingAssetEntity);
+
+        // then
+        assertThat(result).isEmpty();
+    }
+
+    @Test
+    void rejectsInvalidProperties() {
+        // given
+        final var emailAddressHostingAssetEntity = validEntityBuilder()
+                .config(Map.ofEntries(
+                        entry("local-part", "no@allowed"),
+                        entry("sub-domain", "no@allowedeither"),
+                        entry("target", Array.of("xyz00", "xyz00-abc", "garbage", "office@example.com"))))
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(emailAddressHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(emailAddressHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'EMAIL_ADDRESS:test@example.org.config.local-part' is expected to match any of [^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+$] but 'no@allowed' does not match",
+                "'EMAIL_ADDRESS:test@example.org.config.sub-domain' is expected to match any of [^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+$] but 'no@allowedeither' does not match",
+                "'EMAIL_ADDRESS:test@example.org.config.target' is expected to match any of [^[a-z][a-z0-9]{2}[0-9]{2}(-[a-z0-9]+)?$, ^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+@[a-zA-Z0-9.-]+$] but 'garbage' does not match any");
+    }
+
+    @Test
+    void rejectsInvalidIdentifier() {
+        // given
+        final var emailAddressHostingAssetEntity = validEntityBuilder()
+                .identifier("abc00-office")
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(emailAddressHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(emailAddressHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'identifier' expected to match '^\\Qtest@example.org\\E$', but is 'abc00-office'");
+    }
+
+    @Test
+    void validatesInvalidReferences() {
+        // given
+        final var emailAddressHostingAssetEntity = validEntityBuilder()
+                .bookingItem(TEST_MANAGED_SERVER_BOOKING_ITEM)
+                .parentAsset(TEST_MANAGED_SERVER_HOSTING_ASSET)
+                .assignedToAsset(TEST_MANAGED_SERVER_HOSTING_ASSET)
+                .build();
+        final var validator = HostingAssetEntityValidatorRegistry.forType(emailAddressHostingAssetEntity.getType());
+
+        // when
+        final var result = validator.validateEntity(emailAddressHostingAssetEntity);
+
+        // then
+        assertThat(result).containsExactlyInAnyOrder(
+                "'EMAIL_ADDRESS:test@example.org.bookingItem' must be null but is of type MANAGED_SERVER",
+                "'EMAIL_ADDRESS:test@example.org.parentAsset' must be of type DOMAIN_MBOX_SETUP but is of type MANAGED_SERVER",
+                "'EMAIL_ADDRESS:test@example.org.assignedToAsset' must be null but is of type MANAGED_SERVER");
+    }
+}