On 2024-01-08 05:22, ac via talk wrote:
[snip]

https://ascams.com/info/domain-anti-forgery/

https://www.rfc-editor.org/rfc/rfc7208.txt

imnsho you can add dkim etc - but ALL Cyber Criminals have DKIM & DMARC
in fact ALL SPAMMERS also have DKIM & DMARC so it is a fairly useless
thing/loop to jump through and disables privacy and has more minusses
than plusses for general society.
 
anyway, ymmv

Andre

SPF and DKIM are more to make it harder for people to spoof your email address.
SPF should insure that only your email servers can be used to send mail from your domain.
DKIM has the advantage of digitally signing your emails as they go out so that if someone screws with them it should be obvious.

DMARC is more about information sharing so that you can get and give reports about who is trying to spoof email.

This does not help with spammers who are using Microsft, or Google so that the email comes from their domains.

But at least you can stop people sending stuff out as though it was coming from your domain.

There was once a guy who insisted on running an open relay and believed that anybody blocking open relays were infringing on his rights.
He was VERY loud about his convictions that open relays were not the problem, spammers were.

Granted, closing down open relays did not make spamming go away.
It did cut down on the vectors that spammers could use to get their content out.

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