Hi there,
I've got a qmail server that is working from several years. I manage about 15 domains on it and everything works fine except that I would like to block some spammer from send mail even if they are authenticated.
I need to leave authenticated user be able to send email from across the world since they travel a lot, so I can't filter from IP, etc. but I would like that if a user is authenticated with an email address he can't send email with an address with a different domain.
For example:
user@domain1.com authenticates with his email client (Outlook, Thunderbird, etc.) with correct username and password and send email to
me@domain2.com,
you@gmail.com, etc. from
user@domain1.com
But I would like to block his mails if he try to send mail from
user@anotherdomain.com authenticated with username
user@domain1.com.
Is it possbile?
Many thanks in advance to anybody who will help me!
Cinghiuz