From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Thu, 29 Oct 2020 20:09:25 +0000 (+0000)
Subject: Debug: show stalled send-data count on message-errors
X-Git-Tag: exim-4.95-RC0~203
X-Git-Url: https://git.exim.org/exim.git/commitdiff_plain/811622b672d4a4cf3d71fbd66810a66adf76826e

Debug: show stalled send-data count on message-errors
---

diff --git a/src/src/transports/smtp.c b/src/src/transports/smtp.c
index a31982223..9e337e93f 100644
--- a/src/src/transports/smtp.c
+++ b/src/src/transports/smtp.c
@@ -4134,6 +4134,13 @@ if (!sx->ok)
 
         *message_defer = TRUE;
         }
+
+      DEBUG(D_transport) if (sx->cctx.sock >= 0)
+	{
+	int n;
+	if (ioctl(sx->cctx.sock, TIOCOUTQ, &n) == 0)
+	  debug_printf("%d bytes remain in socket output buffer\n", n);
+	}
       }
 
     /* Otherwise, we have an I/O error or a timeout other than after MAIL or