diff --git a/nuc/protonmail-bridge/docker-compose.yml b/nuc/protonmail-bridge/docker-compose.yml
index ac3c15c..72e098e 100644
--- a/nuc/protonmail-bridge/docker-compose.yml
+++ b/nuc/protonmail-bridge/docker-compose.yml
@@ -8,6 +8,7 @@ services:
     ports:
       - "143:143/tcp" # IMAP port
       - "25:25/tcp"  # SMTP port
+      - "587:587/tcp"  # SMTP port
     restart: unless-stopped
 
 volumes: