We have a couple of end users trying to send CAD drawings that are 5 MB and under and they are getting a #554 rejecting banned file attachment ## error message from our Exchange 2010 server. They are using Outlook 2010.
They have been able to send other attachments such as PDFs but this has happened for two different recipients.
We have checked with MXTOOLBOX and we are not on any BlackLists that I can see. There are not any error messages on the server and other email seems fine. I have included an example header email below. Any assistance offered would be appreciated:
Generating server: Hermes.dwma.com
relay.secoenergy.com #554 rejecting banned file attachment ##
Original message headers:
Received: from Hermes.dwma.com ([fe80::d137:ef4f:20bc:b8a0]) by
Hermes.dwma.com ([fe80::d137:ef4f:20bc:b8a0%10]) with mapi id 14.02.0318.001;
Tue, 10 Nov 2015 09:22:11 -0500
From: "Rita L. Klein" <email@example.com>
To: "MARIONY.AURELE@SECOENERGY.COM" <MARIONY.AURELE@SECOENERGY.COM>
Subject: FW: Greater Lakes Phase 3
Thread-Topic: Greater Lakes Phase 3
Date: Tue, 10 Nov 2015 14:22:08 +0000