From 9a2f3914e2aa3d851bb3bea4a6c3643fba3d4258 Mon Sep 17 00:00:00 2001
From: Ludovic Marcotte <lmarcotte@inverse.ca>
Date: Thu, 17 Sep 2015 16:28:42 -0400
Subject: [PATCH] (fix) additional fix for issue #3152

---
 ActiveSync/SOGoActiveSyncDispatcher.m | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ActiveSync/SOGoActiveSyncDispatcher.m b/ActiveSync/SOGoActiveSyncDispatcher.m
index df52b3c68..7fd80aab2 100644
--- a/ActiveSync/SOGoActiveSyncDispatcher.m
+++ b/ActiveSync/SOGoActiveSyncDispatcher.m
@@ -2628,6 +2628,11 @@ static BOOL debugOn = NO;
           [map setObject: [mailObject messageId] forKey: @"in-reply-to"];
 
           references = [[[[[mailObject mailHeaders] objectForKey: @"references"] componentsSeparatedByString: @" "] mutableCopy] autorelease];
+
+          // If there is no References: header, initialize it with In-Reply-To.
+          if ([mailObject inReplyTo] && ![references count])
+             references = [NSMutableArray arrayWithObject: [mailObject inReplyTo]];
+
           if ([references count] > 0)
             {
               // If there are more than ten identifiers listed, we eliminate the second one.