From 87e80be2d16cf22e31f20dcdcab4c96f9709dc16 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Sun, 10 Nov 2019 18:11:49 -0500
Subject: [PATCH] Bug 1079280 - Don't transmit email when imap append response
 is bad.

This only applies to non-literal+ appends. Bad response typically occurs when {size} parameter of append command is larger than server can accept. This prevents TB from sending megabytes of data to a server that has already rejected it.

Tag #1273
---
 mailnews/imap/src/nsImapProtocol.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mailnews/imap/src/nsImapProtocol.cpp b/mailnews/imap/src/nsImapProtocol.cpp
index dee4ff1698..1d0c98d48b 100644
--- a/mailnews/imap/src/nsImapProtocol.cpp
+++ b/mailnews/imap/src/nsImapProtocol.cpp
@@ -6160,7 +6160,11 @@ void nsImapProtocol::UploadMessageFromFile (nsIFile* file,
     if (NS_FAILED(rv)) goto done;
 
     if (!useLiteralPlus)
-      ParseIMAPandCheckForNewMail();
+    {
+       ParseIMAPandCheckForNewMail();
+      if (!GetServerStateParser().LastCommandSuccessful())
+        goto done;
+    }
 
     totalSize = fileSize;
     readCount = 0;