Here's my scenario:-
I have roaming users and I don't want to be an open relay, but I cannot predict where these users are. I need a way for them to say to the SMTP server "hey I belong here, let me send email".
At the moment, I'm just adding their current IP to /etc/postfix/main.cf (mynetworks) to allow to them send their email. I did a search on google and found that a simple solution will be to use smtp authentication. So I thought I ask you guys
I've setup my debian server according to The Perfect Setup - Debian Sarge
. Is smtp authentication enabled already?