[PLUG] Now who made a smtp server do this???

wes plug at the-wes.com
Thu Oct 24 20:13:48 UTC 2019


On Thu, Oct 24, 2019 at 12:26 PM Rodney W. Grimes <freebsd at gndrsh.dnsmgr.net>
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.

-wes



More information about the PLUG mailing list