Updated filter in README

readme.md

@@ -28,7 +28,7 @@ var mailListener = new MailListener({
   tls: true,
   tlsOptions: { rejectUnauthorized: false },
   mailbox: "INBOX", // mailbox to monitor
-  searchFilter: "UNSEEN", // the search filter being used after an IDLE notification has been retrieved
+  searchFilter: ["UNSEEN", "FLAGGED"], // the search filter being used after an IDLE notification has been retrieved
   markSeen: true, // all fetched email willbe marked as seen and not fetched next time
   fetchUnreadOnStart: true, // use it only if you want to get all unread email on lib start. Default is `false`,
   mailParserOptions: {streamAttachments: true} // options to be passed to mailParser lib.