diff --git a/docker-compose.yml b/docker-compose.yml
index 8aa60c1..2deab55 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -116,7 +116,7 @@ services:
     image: imixs/exim4
     environment:
       EXIM_SMARTHOST: "www149.your-server.de:25"
-      EXIM_PASSWORD: "www149.your-server.de:webmaster@imixs.com:WH5y38VFruehling1pnT3RK34x0LG36BP2x57e7dX"
+      EXIM_PASSWORD: "www149.your-server.de:webmaster@imixs.com:$MAILPASSWORD"
       EXIM_ALLOWED_SENDERS: "10.0.0.0/8:172.16.0.0/12:192.168.0.0/16"