I have this mailbox that I setup with a forwarding rule that when a message arrives to inbox form anyone it should redirect the message to a distribution group. But in the inbox all I see are error messages. I checked that the distribution group doesn't have any restrictions on either. I also went and set "Send-as" permission on the distribution for this email address. But I still get this NDR:
Microsoft OutlookReplyReply AllForwardActions
To:
mailbox@domain.com
Wednesday, September 18, 2013 12:28 PM
Delivery has failed to these recipients or groups:
distributiongroup@domain.com
Your message can't be delivered because delivery to this address is restricted.