Thomas Ledbetter a écrit : > > OK.. How about this one: > > I have had good luck blocking SPAM email which has a MAIL FROM: address > in my own domain, by blocking all email from my domain in an access map > on 'smtpd_sender_restrictions', and then listing 'permit_mynetworks' and > 'permit_sasl_authenticated' first. > > I call this 'domain restriction' because it allows you to restrict > email that purports to be from your domain, but was not sent via an > authorized source - a host on your network, or a user which logged in > via SMTP AUTH. > > Now Im seeing SPAM that has a 'From:' header address at my own domain, > but the MAIL FROM: is different.
do you realize that this is exactly the case when you receive your post via this list? > It gets in the perimeter, and then my > anti-spam software whitelists it, because my domain is on the whitelist! > fix your anti-spam whitelist. do not whitelisted based on sender or headers. if you need that, check the origin (received header), spf, or dkim. all these are possible in spamassassin. > Does anyone know of a similar trick to somehow block all email with a > From: address from a particular domain, but let through anything that > comes from your own network, or email that was sent via SMTP AUTH? > then you wouldn't receive your posts from the mailing list server. > I use header_checks, but dont know a way to do this. > >
