Hi, On 06.11.2026 09:48, Mauro De Gennaro wrote:
I like this idea. It should be specified as a new extension that gives clients a way to trust the DKIM2 headers they see.Third-party clients that aren't coupled to the MTA or message store currently have no way to establish that trust. Without it, we'll end up in a similar place as BIMI (leaving aside that its main problem is that’s it’s a business model dressed as a standard), with trust depending on provider-specific arrangements instead of anything the protocol guarantees.
I would like this to work even on IMAP, but yes.Undoing MTA modifications would also be useful for S/MIME, especially in the browser. (I have a Rust implementation up on GitHub that can be compiled into WASM.)
Best, Taavi
smime.p7s
Description: S/MIME Cryptographic Signature
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