Exchange not accepting email from outside to distribution groups
In Exchange 2007, by default no one from the outside is allowed to send to your distribution group. So in your exchange message tracking, you will see this the message. In the message tracking log you will see this:
2010-11-30T19:20:24.175Z,,EMAILSVR,,,,,ROUTING,FAIL,239826,<E1PNVkT-0006EB-Tv@myserver.com>,shank@myserver.com,’550 5.7.1 RESOLVER.RST.AuthRequired; authentication required’,2302,1,,<5f111f5c-c9d0-4709-8fd4-e6d496732bd8>,RD Contact Us request,ase@wer.com,rdigroup@server.myserver.com,
To fix, you must goto exchange mmc, recipient configuration, distribution group, properties of your distribution group, mail flow tab, message delivery restrictions, and uncheck require that all senders are authenticated.
Problem solved
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