On Dec 2, 2009, at 10:17, Stähelin, Simon wrote: > Dear List Users > > Is it possible (and how) to block emails sent via an outside smtp server (not > mynetworks) with our domain? > > Background: > We had phishing attacks from outside (not our ip-range) with the from-address > someth...@ourdomain.ch > which was sent to our users. > > Thanks a lot in advance > Simon
Hi Simon. Look into check_sender_access. Also, I've found that implementing the zen spamhaus blacklist got rid of practically all of that type of spam. If you implement that, you'll want to ensure that you have a method for legitimate mail to get through; for that, I permit_sasl_authenticated and permit_mynetworks. Daniel
