Re: [exim4] mixed up about terminology
On Mon, Oct 13, 2014 at 11:24 AM, lee <lee@yagibdah.de> wrote:
> Jerry Stuckle <jstuckle@attglobal.net> writes:
>
>> Among other things, legitimate MTAs have MX records. Anti-spam routines
>
> Who prevents a MUA from having an MX record and sending a HELO that
> matches the RDNS entry? And what are these "other things" you're
> referring to?
MX record? Recorded in the domain name servers? When the sender is a
bot with an ephemeral MTA/MUA?
Hmm. Yeah, it can be done. Patient and careful use of free dynamic DNS
services, or DNS poisoning. Temporary and slow.
But the more you make the junkmailers work for their money, the more
they switch to legitimate work.
--
Joel Rees
Be careful when you see conspiracy.
Look first in your own heart,
and ask yourself if you are not your own worst enemy.
Arm yourself with knowledge of yourself.
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