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DKIM headers can have an optional length parameter which says "the first n bytes of the message body is cryptographically signed", whilst allowing the rest of t
by 256_ 2y ago
DKIM headers can have an optional length parameter which says "the first n bytes of the message body is cryptographically signed", whilst allowing the rest of the message to be modified. I don't know if anyone actually uses it, though; I don't think I've ever seen or used it.
Also, DKIM can optionally be lax about whitespace.
- megous 2y agoThat sounds like something that can interact really well with HTML email, if you can manage to overlay the unsigned content over signed content visually via CSS/inline styles. :)