I have exchange 2000 with SP2.
I am getting this error message when users are trying to send to external addresses (they are authenticating to the server before sending is checked)
There was a SMTP communication problem with the recipient's email
server. Please contact your system administrator.
<AMExchFE.americas.ad.domain.com #5.5.0 smtp;550 #5.1.0 Address
I have changed many settings trying to get it to work but still nothing.
PLease assist :(
it is exchange2000 on a win2000 box.