On May 16, 2012, at 9:42 AM, Ansgar Wiechers wrote: > On 2012-05-16 James Lay wrote: >> Thanks Ben and Brian. I haven't found too much information on >> implementing this... > > Postfix is well-documented. I suggest you start here: > > http://www.postfix.org/documentation.html > >> I'm guessing it's just adding: >> >> transport_maps = regexp:/etc/postfix/reject-users >> >> ? > > No. > >> Does my transport_maps file contain domains or can it contain email >> addresses? > > The answer to that question can be found in "man 5 transport". However, > you don't want to mess around with a reject-users table in the first > place (particularly not as a transport map). Instead just change your > smtpd_recipient restrictions like this: > > smtpd_recipient_restricitons = > permit_mynetworks > reject_unauth_destination > reject_unlisted_recipient > ... > > As Brian already explained, it's the default to reject undefined > recipients, so you wouldn't need to do anything (unless you have > configured a catch-all somewhere, which you shouldn't). However, I > consider it good practice to reject mail for invalid recipients early > on (before doing more expensive checks), which is what the > reject_unlisted_recipient restriction is for. > > Regards > Ansgar Wiechers
Thanks Ansgar, I was under the impression that DISCARD was better then REJECT due to backscatter? We get hundreds of crazy emails to things like ya64s...@mydomain.com, so I opted for DISCARD instead. I'll do some more reading and see how I can get this to fly. Thanks again. James
