From 83b52e0cd77e3fd189e1508dde9da08b9f50b94f Mon Sep 17 00:00:00 2001
From: neil <gitsrc@neilpang.com>
Date: Fri, 10 Jul 2026 10:38:52 +0800
Subject: [PATCH] notify/smtp.sh: add --crlf so curl sends CRLF line endings

Postfix with smtpd_forbid_bare_newline (default hardening since 3.9,
after SMTP smuggling) rejects the message with
"521 5.5.2 Error: bare <LF> received". RFC 5321 requires CRLF.
The python sender is unaffected (smtplib already emits CRLF).

fix https://github.com/acmesh-official/acme.sh/issues/7104
---
 notify/smtp.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/notify/smtp.sh b/notify/smtp.sh
index f5ebebca..a7318692 100644
--- a/notify/smtp.sh
+++ b/notify/smtp.sh
@@ -200,6 +200,7 @@ _smtp_send_curl() {
 
   set -- "$@" \
     --upload-file - \
+    --crlf \
     --mail-from "$SMTP_FROM" \
     --max-time "$SMTP_TIMEOUT"