Is it possible to configure SMTP authentication on Postfix with different user/pass credentials for different domains?
So, I have a MTA that relays emails from ~20 different domains. When sending emails to a specific domain, say example.com, my MTA has to authenticate. No problem, this solved the problem: http://postfix.state-of-mind.de/patrick.koetter/smtpauth/smtp_auth_mailservers.html
But, I have a different account for every sender domain. So, when mydomain1.com sends email to example.com, it uses one account. Another one for mydomain2.com -> example.com etc.
Is this achievable through Postfix?