We've gone a long time without specifically needing this but suddenly we are getting bombarded with spam pretending to be from one of our addresses but originating from outside. So I need to block mail with a @marlboro.edu sender unless it helos from local servers or specific external IP ranges.
I have a few ideas on how to do this but but wondered if anybody could quickly point me in the direction of best practices for this. Is there a simple way or is it best to use smtpd_restriction_classes? thanks -- John Baker Network Administrator Marlboro College Phone: 451-7551 Cell: 490-0066
