undeliverable e-mail 5.1.0 error SBS 2003
Posted on 2008-10-28
I am at a breaking point with this NDR message. I am running a SBS 2003 with a smarthost configured. I have certain e-mail addresses that I cannot send email to. The error message I receive is below. The strange thing is I can send a email from the server to this address with no problem, but other users on the network cannot send to this address.
The email address is firstname.lastname@example.org
The e-mail address could not be found. Perhaps the recipient moved to a different e-mail organization, or there was a mistake in the address. Check the address and try again.
< isp.att.net #5.1.0 smtp; (Permanent Failure: Other address status)>
Any help at this point is welcomed.