diff --git a/nix-system-configs/modules/system/mail-server.nix b/nix-system-configs/modules/system/mail-server.nix
index 82f4f6a..4ab5c72 100644
--- a/nix-system-configs/modules/system/mail-server.nix
+++ b/nix-system-configs/modules/system/mail-server.nix
@@ -90,7 +90,7 @@ in {
               protocol = "smtp";
               # Use port 587 for SMTP submission with STARTTLS, as port 25 is often blocked by ISPs for outgoing mail to prevent spam.
               # This way, you can still receive mail on port 25 but require authenticated submission on port 587.
-              bind = "[::]:587"; # I am so fucking fed up this shit, this fucking ISP is sending me to early grave.
+              bind = "[::]:25"; # I am so fucking fed up this shit, this fucking ISP is sending me to early grave.
             };
             submissions = {
               bind = "[::]:465";