Gene, Is mail essentials on the same box as exchange (tcrnycbde2)? If not this should tell you how far it is getting. Also could try checking the logs - if its getting to exchange it should turn up in /badmail from memory. But the error you are getting would suggest that the problem is with the body encoding type. I have no experience with GFI, however I know that while most MTAs support MIME, some nowadays have dropped support for UUENCODE, the old unix to unix encoding type. You can try checking whether GFI supports this and/or other more arcane encoding types, else you will need to ask the vendor to change the send type, which depends on what they're using at their end. Plain text/RTF should be fine, MIME and HTML should also be supported. Note that changing the "always send plain text to this recipient" option in outlook is only referring to message text, not the encoding type. And don't let the vendor put you off, remember you're the client! Jamie. -----Original Message----- From: Gene O'Brien [mailto:Gene@xxxxxxxxxx] Sent: Wednesday, 23 April 2003 12:48 AM To: [ExchangeList] Subject: [exchangelist] Non-Delivery Message Help Please http://www.MSExchange.org/ 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