diff --git a/paperless/docker-compose.yml b/paperless/docker-compose.yml
index 32db056..7b79bd9 100644
--- a/paperless/docker-compose.yml
+++ b/paperless/docker-compose.yml
@@ -83,6 +83,7 @@ services:
     networks:
       - paperless_internal
       - proxy
+      - mail_internal
     labels:
       - traefik.enable=true
       - traefik.docker.network=proxy
@@ -165,3 +166,6 @@ networks:
 
   proxy:
     external: true
+
+  mail_internal:
+    external: true