diff --git a/app/bundles/EmailBundle/EventListener/ProcessReplySubscriber.php b/app/bundles/EmailBundle/EventListener/ProcessReplySubscriber.php
index 25c6460e05b..3de35f470c5 100644
--- a/app/bundles/EmailBundle/EventListener/ProcessReplySubscriber.php
+++ b/app/bundles/EmailBundle/EventListener/ProcessReplySubscriber.php
@@ -71,10 +71,16 @@ public function onEmailConfig(MonitoredEmailEvent $event)
      */
     public function onEmailPreFetch(ParseEmailEvent $event)
     {
-        $lastFetch = $this->cache->get(self::CACHE_KEY);
-        if ($lastFetch) {
-            $event->setCriteriaRequest(self::BUNDLE, self::FOLDER_KEY, Mailbox::CRITERIA_UID.' '.$lastFetch.':*');
+        if (!$lastFetchedUID = $this->cache->get(self::CACHE_KEY)) {
+            return;
         }
+
+        $startingUID = $lastFetchedUID + 1;
+
+        // Using * will return the last UID even if the starting UID doesn't exist so let's just use a highball number
+        $endingUID = $startingUID + 1000000000;
+
+        $event->setCriteriaRequest(self::BUNDLE, self::FOLDER_KEY, Mailbox::CRITERIA_UID." $startingUID:$endingUID");
     }
 
     /**
diff --git a/app/bundles/EmailBundle/MonitoredEmail/Mailbox.php b/app/bundles/EmailBundle/MonitoredEmail/Mailbox.php
index d917a853b16..44827dba4f7 100644
--- a/app/bundles/EmailBundle/MonitoredEmail/Mailbox.php
+++ b/app/bundles/EmailBundle/MonitoredEmail/Mailbox.php
@@ -556,9 +556,19 @@ public function fetchUnread($folder = null)
      */
     public function searchMailbox($criteria = self::CRITERIA_ALL)
     {
-        $mailsIds = imap_search($this->getImapStream(), $criteria, SE_UID);
+        if (preg_match('/'.self::CRITERIA_UID.' ((\d+):(\d+|\*))/', $criteria, $matches)) {
+            // PHP imap_search does not support UID n:* so use imap_fetch_overview instead
+            $messages = imap_fetch_overview($this->getImapStream(), $matches[1], FT_UID);
 
-        return $mailsIds ? $mailsIds : [];
+            $mailIds = [];
+            foreach ($messages as $message) {
+                $mailIds[] = $message->uid;
+            }
+        } else {
+            $mailIds = imap_search($this->getImapStream(), $criteria, SE_UID);
+        }
+
+        return $mailIds ? $mailIds : [];
     }
 
     /**