2018-10-25 8:33 GMT+02:00 Viktor Dukhovni <postfix-us...@dukhovni.org>:
> On Thu, Oct 25, 2018 at 08:11:35AM +0200, Poliman - Serwis wrote: > > > Hi. I heard that having a non-functional server as the primary MX is a > > well-known trick to reduce the amount of incoming spam, as most software > > used by spammers will only ever try the highest-priority MX. How to do > this? > > No. This is a myth, and reduces the reliability and performance > of legitimate email delivery. Use a decent RBL, postscreen(8) may > help to reduce the load on the server and keep smtpd(8) more available > for legitimate email. > > -- > Viktor. > Thanks God I have decided to ask. What does it mean "keep smtpd(8) more available for legitimate email." and how use decent RBL? I have many domains on the server. Company politics. I think that it wasn't best idea, because server sends many thousands emails each day. Of course domains are clear like IP and I set spf, dkim, dmarc for these domains but I although have deferrals for yahoo domains (currently) like .fr, .com, .pl and also fedex.com. -- *Pozdrawiam / Best Regards* *Piotr Bracha*
