diff --git a/templates/env.production.j2 b/templates/env.production.j2
index 423fbb8..dc60620 100644
--- a/templates/env.production.j2
+++ b/templates/env.production.j2
@@ -50,7 +50,7 @@ VAPID_PUBLIC_KEY={{mastodon_docker_vapid_private}}
 # Sending mail
 # ------------
 SMTP_SERVER={{mastodon_docker_smtp.server}}
-SMTP_PORT=587{{mastodon_docker_smtp.port}}
+SMTP_PORT={{mastodon_docker_smtp.port}}
 SMTP_LOGIN={{mastodon_docker_smtp.login}}
 SMTP_PASSWORD={{mastodon_docker_smtp.password}}
 SMTP_FROM_ADDRESS={{mastodon_docker_smtp.from}}