ZP-1167 Some new messages are outdated and lost when sync. Released under the...

ZP-1167 Some new messages are outdated and lost when sync.  Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/imap/imap.php

@@ -2249,6 +2249,14 @@ class BackendIMAP extends BackendDiff implements ISearchProvider {
             if (is_array($overview)) {
                 if (isset($overview[0]->date)) {
                     $epoch_sent = strtotime($overview[0]->date);
+                    if ( $epoch_sent === false ) {
+                        $pattern = '/^(Sun|Mon|Tue|Wed|Thu|Fri|Sat), [0-9]+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) [0-9]+ [0-9]+:[0-9]+(:[0-9]+)* /';
+                        if (preg_match($pattern, $overview[0]->date, $matches) == 1) {
+                            ZLog::Write(LOGLEVEL_DEBUG, sprintf("BackendIMAP->imap_inside_cutoffdate(): date: %s, match: %s", $overview[0]->date, $matches[0]));
+                            $epoch_sent = strtotime($matches[0].' UTC');
+                        }
+                    }
+                    ZLog::Write(LOGLEVEL_DEBUG, sprintf("BackendIMAP->imap_inside_cutoffdate(): cutoffdate: %s, epoch_sent: %s", $cutoffdate, $epoch_sent));
                     $is_inside = ($cutoffdate <= $epoch_sent);
                     ZLog::Write(LOGLEVEL_DEBUG, sprintf("BackendIMAP->imap_inside_cutoffdate(): Message is %s cutoffdate range", ($is_inside ? "INSIDE" : "OUTSIDE")));
                 }