External email Taking too long to arrive

I have a 2010 exchange environment and we recently started having problems with receiving external email, rebooted all mail servers, then external email went back to working for  a couple of hours and now its back to not receiving external.

This is part of what i get
Remote Server returned '< #4.4.7 smtp;400 4.4.7 Message delayed>'
Original message headers:
Received: from Barracuda.Bridge.local (10.100.100.10) by DNX-Edge.bridge.local
 (10.100.100.11) with Microsoft SMTP Server id 14.3.123.3; Thu, 6 Feb 2014
 10:54:56 -0700
X-ASG-Debug-ID: 1391709291-0558a74c1148820001-CEj6SR
Received: from na01-by2-obe.outbound.protection.outlook.com
 (mail-by2lp0235.outbound.protection.outlook.com [207.46.163.235]) by
 Barracuda.Bridge.local with ESMTP id NO5Oso30x7uvSDcP for
 <carlos.alvarez@pprm.org>; Thu, 06 Feb 2014 10:54:51 -0700 (MST)
casco67Asked:
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casco67Connect With a Mentor Author Commented:
Fixed, Bad Receive Connector.
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