On Mon, May 23, 2016 at 11:47 AM, Bill Cole < postfixlists-070...@billmail.scconsult.com> wrote:
> On 22 May 2016, at 22:31, Alberto Lepe wrote: > > In my understanding, "reject_non_fqdn_sender" should have blocked this >> email as the sender's hostname is "unknown". >> > > No. In Postfix nomenclature the "sender" is the SMTP envelope sender > address. The host offering the message is the "client". > If I understand you correctly, in this case, "sender" means " brushfiremusic.net <valenzuelaelvira94...@brushfiremusic.net>", right? > > If that is right, then why it >> is not working? If I'm mistaken, then what do I need to block mails coming >> from "unknown" sources? >> > > There are nuances her, but reject_unknown_reverse_client_hostname is the > safest choice. The other choice is reject_unknown_client_hostname but > that's MUCH riskier because it is a stricter constraint. See the man page > for postconf(5) for the details. > Thanks! I will read more about it and try it. Thanks again!
