diff --git a/bundles/mailserver/items.py b/bundles/mailserver/items.py
index 6dbce93..335ffc0 100644
--- a/bundles/mailserver/items.py
+++ b/bundles/mailserver/items.py
@@ -2,3 +2,42 @@ assert node.has_bundle('postfix')
 assert node.has_bundle('dovecot')
 assert node.has_bundle('letsencrypt')
 assert node.has_bundle('roundcube')
+
+from shlex import quote
+
+setup = '''
+    CREATE TABLE domains (
+        "id" BIGSERIAL PRIMARY KEY,
+        "name" varchar(255) UNIQUE NOT NULL
+    );
+    CREATE INDEX ON domains ("name");
+
+    CREATE TABLE users (
+        "id" BIGSERIAL PRIMARY KEY,
+        "name" varchar(255) NOT NULL,
+        "domain_id" BIGSERIAL NOT NULL,
+        CONSTRAINT "fk_domain"
+            FOREIGN KEY("domain_id") 
+                REFERENCES domains("id"),
+        "password" varchar(255) NOT NULL,
+        "redirect" varchar(255) DEFAULT NULL
+    );
+    CREATE UNIQUE INDEX ON users ("name", "domain_id") WHERE "redirect" IS NULL;
+'''
+
+actions['initialize_mailserver_db'] = {
+    'command': f'psql -d mailserver -c {quote(setup)}',
+    'unless': f'psql -At -d mailserver -c "SELECT to_regclass(\'public.users\')" | grep -q \'^users$\'',
+    'needs': [
+        'postgres_db:mailserver',
+    ],
+}
+
+
+# TEST
+'''
+INSERT INTO domains (id, name)
+VALUES (1, 'mails2.sublimity.de');
+INSERT INTO users (id, name, domain_id, password)
+VALUES (1, 'ckn', 1, MD5('test123'));
+'''
diff --git a/bundles/mailserver/files/mailserver.sql b/data/mailserver.sql
similarity index 77%
rename from bundles/mailserver/files/mailserver.sql
rename to data/mailserver.sql
index fde4569..548e437 100644
--- a/bundles/mailserver/files/mailserver.sql
+++ b/data/mailserver.sql
@@ -17,3 +17,9 @@ CREATE TABLE users (
   "redirect" varchar(255) DEFAULT NULL
 );
 CREATE UNIQUE INDEX ON users ("name", "domain_id") WHERE "redirect" IS NULL;
+
+
+INSERT INTO domains (id, name)
+VALUES (1, 'mails2.sublimity.de');
+INSERT INTO users (id, name, domain_id, password)
+VALUES (1, 'ckn', 1, MD5('test123'));