I have recently upgraded our exchange server to 2010 things are working well but some external programs still can not use the server to send out emails using smtp. What is going on is that the external programs are trying to send emails to usernames only and SMTP is denying it calling them invalid users. what I need to find out if there is a way to have all aliased sends to append them with @domain.com before checking to see if they are valid. Also in forsight I will need to adjust the from recipient as well.
from the command line I can recreate the problem:
220 mail.domain.com Microsoft ESMTP MAIL Service ready at Wed, 25 Aug 2010 09:25:35 -0700
250 mail.domain.com Hello [192.168.0.225]
mail from: email@example.com
250 2.1.0 Sender OK
rcpt to: firstname.lastname@example.org
250 2.1.5 Recipient OK
rcpt to: user
501 5.1.3 Invalid address
I would like to tell the admins of the machines to fully qualify the email address but they say they aare not in control of that aspect.
thanks in advance.