On Thu, 24 Oct 2019 13:13:48 -0700 wes <[email protected]> wrote: > On Thu, Oct 24, 2019 at 12:26 PM Rodney W. Grimes > <[email protected]> wrote: > > > > Inconvenient for you, perhaps, but I don't agree that it's > > > stupid. It's a great way to weed out spam from spoofed invalid > > > IPs. > > > > It weeds out nothing, it is rejecting it because of what is in the > > DNS records, > > and that is fundmentally wrong. The address I connected from, > > 65.75.216.6 to > > his server IS in DNS and is VALID. The server has wrongly rejected > > valid email and again, this well do 0 to stop any spam, so that is > > a red herring. > > > > > Insist all you want, my experience is that spammers have screwy DNS > records quite frequently, and checking their validity is a great way > to filter them out. >
With a proper setup the amount of mail or mail servers that get caught based on 'screwy dns records' is really minuscule. Here is a graph of rejections by one of the servers I manage with +10K mails/day. https://0x0.st/zYKN.png The rest get picked up by hueristic analysis via plugins to spamass. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
