Re: New "Old-" headers emerging from the horizon

Bernd Wurst <[email protected]>
Newsgroups gmane.mail.imap.courier.general
Message-ID <[email protected]>
Am 28.01.24 um 00:53 schrieb Sam Varshavchik:
> But that will break the DKIM Signature.

Why?

DKIM specifies at each message, which header fields are part of the 
signed data set. BIMI spec says, these two headers may never be part of 
a DKIM signature.

So it mustn't break DKIM if you leave them or remove them or rename them.


I doubt that there will ever be end user MUAs to trust incoming 
BIMI-Indicator headers. Would be an invitation for phishing. It's 
unrealistic that a MUA can rely on all mail servers out there 
implementing this feature set.

IMO, this feature is designed only for heavily integrated web mail 
systems like google mail. Standalone MUAs can still check the 
authoritative BIMI headers if they'd like to.

The idea that all mail servers - including those that don't care 
anything about BIMI brainf*** - should remove those silly headers is 
intrusive.


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