Hello all, I thought there was a way in Postfix to perform DNS lookups on the senders domain.
For example, if I send a forged mail from my machine to say my gmail address then if I look at the full headers I can see the actual IP address it was sent from and it does not resolve the the forged address. I thought google were actually using this method. 2009/9/13 mouss <mo...@ml.netoyen.net>: > James Hankins a écrit : >> One way, albiet expensive on CPU util is reject_unverified_sender. > > > What are the chances that dam...@largedomain does not exist? > and what if this is used as a "spam trap" by hotmail? > > >> [snip] >> > -- Regards, Damian Myerscough
