S/MIME signature validation support for e-mail clients via Proton Bridge
Please add support, that an e-mail client connected via Proton Bridge is able to validate S/MIME signature.
Reason: Banks, delivery services, public authorities, etc. use S/MIME signed e-mails to prove that an e-mail is genuine. This helps fighting fraud, fishing and other criminal activites.
Context: Currently, S/MIME signature cannot be validate in Proton Mail. A validation with an e-mail client connected via Proton Bridge cannot validate an S/MIME signature because Proton modifies e-mail headers that are essential for a successful S/MIME signature validation.
The posted idea "S/Mime Support" at https://protonmail.uservoice.com/forums/284483-proton-mail-calendar/suggestions/16574134-s-mime-support requests for much more: a full S/MIME implementation.Although full S/MIME support would be great, in my opinion, the most important part is to be able to validate S/MIME signatures.
AZ
shared this idea
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Lukas Mayer
commented
I agree that this is important. While PGP is Proton's choice for good reasons, S/MIME is much more commonly used with Businesses and in the Enterprise.
Leaving the authenticity that valid S/MIME signatures provide on the table, would be a little negligent.