From fffc16dd9c4ad063ecee2ac073266120b203e136 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sun, 19 Oct 2025 11:28:15 +0200
Subject: [PATCH] smtp: return value ignored

Return value from Curl_client_write was overwritten by
smtp_perform_command making errors ignored.

Pointed out by ZeroPath

Closes #19136
---
 lib/smtp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/smtp.c b/lib/smtp.c
index 76ed4f280a..30f8535765 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -1136,7 +1136,7 @@ static CURLcode smtp_state_command_resp(struct Curl_easy *data,
     if(!data->req.no_body)
       result = Curl_client_write(data, CLIENTWRITE_BODY, line, len);
 
-    if(smtpcode != 1) {
+    if(!result && (smtpcode != 1)) {
       if(smtp->rcpt) {
         smtp->rcpt = smtp->rcpt->next;
 
-- 
2.47.3