Mail server: win2003 std, exchange 2003
When i try to send and recive mail to an mail server @swipnet.se i got this error:
firstname.lastname@example.org på 2007-07-27 10:50
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<Mailserver.domain.local #5.5.0 smtp;573 Administrator@company.se unknown user account>
I can send to other domains, and i recive mail from other domains