diff --git a/.gitignore b/.gitignore
index cb85520..b2871c4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -329,3 +329,21 @@ cython_debug/
 
 # GovOPlaN WebUI test output
 webui/.mail-test-build/
+
+# GovOPlaN shared ignore rules from govoplan-core
+# Local WebUI test/build scratch directories
+.component-test-build/
+.module-test-build/
+.policy-test-build/
+.template-preview-test-build/
+.import-test-build/
+webui/.component-test-build/
+webui/.module-test-build/
+webui/.policy-test-build/
+webui/.template-preview-test-build/
+webui/.import-test-build/
+*.db
+# GovOPlaN local runtime state
+runtime/
+webui/.module-test-build/
+webui/.component-test-build/
diff --git a/src/govoplan_mail/backend/manifest.py b/src/govoplan_mail/backend/manifest.py
index 33d269c..dd2886a 100644
--- a/src/govoplan_mail/backend/manifest.py
+++ b/src/govoplan_mail/backend/manifest.py
@@ -11,6 +11,8 @@ from govoplan_core.core.modules import (
     FrontendModule,
     MigrationSpec,
     ModuleContext,
+    ModuleInterfaceProvider,
+    ModuleInterfaceRequirement,
     ModuleManifest,
     NavItem,
     PermissionDefinition,
@@ -89,7 +91,18 @@ manifest = ModuleManifest(
     name="Mail",
     version="0.1.6",
     required_capabilities=(CAPABILITY_AUTH_PRINCIPAL_RESOLVER, CAPABILITY_AUTH_PERMISSION_EVALUATOR),
-    optional_dependencies=(),
+    optional_dependencies=("campaigns",),
+    provides_interfaces=(
+        ModuleInterfaceProvider(name="mail.campaign_delivery", version="0.1.6"),
+    ),
+    requires_interfaces=(
+        ModuleInterfaceRequirement(
+            name="campaigns.mail_policy_context",
+            version_min="0.1.0",
+            version_max_exclusive="0.2.0",
+            optional=True,
+        ),
+    ),
     permissions=PERMISSIONS,
     route_factory=_mail_router,
     role_templates=ROLE_TEMPLATES,