diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index c0bd2fb..f2daa53 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -293,8 +293,8 @@ in
         # Allowing AUTH on a non encrypted connection poses a security risk
         smtpd_tls_auth_only = true;
         # Log only a summary message on TLS handshake completion
-        smtp_tls_loglevel = "1";
-        smtpd_tls_loglevel = "1";
+        smtp_tls_loglevel = lib.mkIf cfg.debug "1";
+        smtpd_tls_loglevel = lib.mkIf cfg.debug "1";
 
         # Configure a non blocking source of randomness
         tls_random_source = "dev:/dev/urandom";