I'm wondering why are you setting the following policies under recipient restrictions and not under sender restrictions? Maybe it's more efficient?
reject_non_fqdn_sender reject_unlisted_sender reject_authenticated_sender_login_mismatch Last, what do you think about reject_unverified_sender? Is it a resources drainer? Thanks a lot! On Mon, Mar 24, 2014 at 8:44 PM, Pau Peris <p...@webeloping.es> wrote: > Thank you everyone. Your advises has been very useful to resolve this > issue. > > > On Sat, Mar 22, 2014 at 2:17 PM, Wietse Venema <wie...@porcupine.org>wrote: > >> Pau Peris: >> > Thanks for the explanation but i think i'm not understanding you. I >> > understand MX records are not mandatory but i'm wondering what am i >> > supposed to do when someone tries to send an email and the from address >> is >> > not valid but an A or CNAME RR exists? >> >> This is described in RFC 5321 section 5.1. >> >> >> Wietse >> > > >
