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From: Antonio Radici <antonio@debian.org>
Date: Thu, 27 Feb 2014 17:16:58 +0100
Subject: 603288-split-fetches
A workaround for Exchange 2010 IMAP protocol,
tracked in http://bugs.mutt.org/3459,
already merged in the ubuntu version of Mutt.
Gbp-Pq: Topic upstream
---
imap/message.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/imap/message.c b/imap/message.c
index 3504be8..4234e22 100644
--- a/imap/message.c
+++ b/imap/message.c
@@ -240,6 +240,15 @@ int imap_read_headers (IMAP_DATA* idata, int msgbegin, int msgend)
char *cmd;
fetchlast = msgend + 1;
+ /* Microsoft Exchange 2010 violates the IMAP protocol and
+ * starts omitting messages if one FETCHes more than 2047 (or
+ * or somewhere around that number. We therefore split the
+ * FETCH into chunks of 2000 messages each */
+ if (fetchlast - msgno - 1 > 2000)
+ {
+ fetchlast = msgno+1 + 2000;
+ }
+
safe_asprintf (&cmd, "FETCH %d:%d (UID FLAGS INTERNALDATE RFC822.SIZE %s)",
msgno + 1, fetchlast, hdrreq);
imap_cmd_start (idata, cmd);
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