diff --git a/docker-compose.yml b/docker-compose.yml
index a9d1539..7d0cb1b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,6 +14,9 @@ services:
       - "995:995"
       - "143:143"
       - "993:993"
+    environment:
+      - SSL_TYPE=self-signed
+      - SSL_DOMAIN=mail.crabs-games.art
     volumes:
       - ./data:/var/mail
       - ./config:/tmp/docker-mailserver
diff --git a/mailserver.env b/mailserver.env
index 06755be..3d84353 100644
--- a/mailserver.env
+++ b/mailserver.env
@@ -7,4 +7,3 @@ ENABLE_CLAMAV=1
 ENABLE_FAIL2BAN=1
 ONE_DIR=1
 DMS_DEBUG=0
-SSL_TYPE=self-signed