I'm running Exchange 2007 and have a mail enabled public folder with a number of rules to forward the mail to various distribution groups depending on the subject. for some reason, Exchange is not forwarding emails for certain distribution groups. All the groups are Universal Distribution Groups and all have been added to Exchange. If I send directly to the group, all the members get the email, but if I add the group to a rule in the public folder, nothing gets sent. Whats strange is that this is only for some of my groups, not all of them and they are all configured the exact same way. I know the rule is working because if I set the rule to forward to the group and an individual, the individual gets the email, but the group does not. The email that comes to the individual shows the group on the "To" line, so the rule "appears" to be sending to it, but it never gets there. Any ideas? Thanks, RichRichard

One reason could be this: This is mail from the Internet. By default mail-enabled public folders accept mail from outside, distribution groups don't. Distribution groups require that the user who sends mail is authenticated. If you use the message tracking tool, you should see this error message: 550 5.7.1 RESOLVER.RST.AuthRequired; authentication required The solution would be to uncheck Require that all senders are authenticated (Properties, Mail Flow Setting, Message Delivery Restrictions).MCTS: Messaging | MCSE: S+M

That was it. Thank you, Thank you, Thank you! I had no idea that distribution groups do not accept email from non-authenticated users. Has it always been this way in every version of Exchange? I'm not sure why some of my distribution groups had this unchecked and others didn't. I haven't looked, but perhaps it's only the older ones created before we upgraded to Exchange 2007. Anyway, I would have thought that email being forwarded from a public folder would be authenticated by default since it's never really leaving Exchange, no? Thanks again, Rich Richard

Hi, More information about Distribution Group Properties http://technet.microsoft.com/en-us/library/bb125178.aspxPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT

Booyah! Thanks. I just had the same problem and found your suggestion hit the bullseye.