On 8/16/2023 10:48 AM, Murray S. Kucherawy wrote:
Yet, an open
signer is for DKIM the equivalent of what an open relay is for SPF.
It is nothing of the sort.
Open relays perform a relaying function, which actively moves mail,
where the abuse is a) obfuscation, and b) fan-out.
What you are calling open signer allows adding any domain's
authenticated identity onto the message, which permits other sites to
develop and evaluate the reputation of the mail stream that uses the
identity.
The former is abuse. The second is potentially useful.
Since you think otherwise, please explain.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
mast:@dcrocker@mastodon.social
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