Re: [ietf-smtp] Dombox - A Zero Spam Mail System

On Wed, 25 Sep 2019 10:16:13 +0530, Viruthagiri Thirumavalavan said:
> In my system we are isolating only the website related mails.
> human-to-human mails gonna work as usual.
And you tell that it's a "website related" mail, how, exactly?

You get a connection on port 25. How do you know it's really a real person and
not a "website related" mail that lies in the From: field?

It's *really* easy to design a mail system that stops spam when everybody 
follows
the rules.   Making one that works even when the bad guys intentionally break 
the
rules is a lot harder...  And making one that works *and* that Joe Sixpack will 
actually
use is damned near impossible.

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