Accept mail from only authorised senders

[coopermarsh]

I want to accept mail from a few authorised senders.

I have a web server using postfix to send mail to exchange. I only want a specific users to be able to send email through postfix. we have been hit a few times with spammers using the online forms to send spam through our domain.

 

[Noway2]

Use the smtpd_client_restrictions, create a table of allowed senders. Or use permit SASL Authenticated only without permit my networks which will give you username and password authentication.

http://www.postfix.org/SMTPD_ACCESS_README.html