Hi All, Using Exchange 5.5 with GFI Mail Essentials 8.0. One particular vendor who regulary sends us mail is getting blocked somewhere along the line. They're whitelisted in GFI, so it would seem they're getting through there. Here's the Non Delivery message I get: Reporting-MTA: dns;tcrnycbde2.tcr-ny.com Received-From-MTA: dns;vtocqp01.sabre.com Arrival-Date: Tue, 22 Apr 2003 11:05:20 -0400 Final-Recipient: rfc822;bonnie@xxxxxxxxxx Action: failed Status: 5.6.1 Diagnostic-Code: smtp;554 5.6.1 Body type not supported by Remote Host What do I need to look for here?? This is becoming quite an issue, as it's our travel agent, and our users need their itineraries! Thanks very much, Gene O'Brien Network Administrator Three Cities Research (212)605-3229 gene@xxxxxxxxxx