From 30f68db816c96c7783ce6a8adcc983b90b3a6f5b Mon Sep 17 00:00:00 2001
From: John L <johnl@taugh.com>
Date: Sun, 13 Jun 2021 01:29:53 -0400
Subject: [PATCH] In imaplib, deal with extra blank line

Some (buggy) IMAP servers add an extra blank line after a literal value. This ignores the blank line.
MacOS mail and T'bird can deal with the blank line so it seems to be a somewhat common server bug.
---
 Lib/imaplib.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index 73184396d894a38..920d5b694788420 100644
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -1128,6 +1128,9 @@ def _get_response(self):
                 # Read trailer - possibly containing another literal
 
                 dat = self._get_line()
+                # ignore blank line some servers send after the counted data
+                if dat == b'':
+                    dat = self._get_line()
 
             self._append_untagged(typ, dat)