From 81ace7438008dbb25df7dbafb13ee89bb0741c9b Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Tue, 01 Apr 2025 23:33:47 +0800
Subject: [PATCH] LMTP: Return 550 on errors

---
 lmtp_server.go | 10 +++++++++-

diff --git a/lmtp_server.go b/lmtp_server.go
index 889ed31fa33dcdbb1abef853034dd6f79571eac4..20492315372c2dd6cd1199056d6d55a23df88866 100644
--- a/lmtp_server.go
+++ b/lmtp_server.go
@@ -168,5 +168,13 @@
 end:
 	session.to = nil
 	session.from = ""
-	return err
+	switch err {
+	case nil:
+		return nil
+	default:
+		return &smtp.SMTPError{
+			Code:    550,
+			Message: err.Error(),
+		}
+	}
 }

-- 
2.48.1