Tag: Troubleshooting

Exchange 2010 Distribution Lists Block Messages from External Senders

The process of creating a distribution list and making it receive email from all senders (local and external) wasn't a big deal in Exchange 2003. But things changed in Exchange 2007 and 2010, causing external senders to get a 550 5.7.1 error. (Apr 27, 2011)

  • Read more /
  • Comment /