>If Mailman (and other MLMs) would provide some header data that listed >msg modifications (i.e. pre-pended subject with 6 chars, post-pended >body with 6 lines, etc), would this be beneficial for anyone to use in >order to reconstruct an original msg and validate the original DKIM >sig (X-Google-DKIM-Signature, etc.) ?
In a word, no, partly because it's unlikely you could describe enough modifications to be generally useful (how do you describe throwing away two MIME parts and adding a boilerplate header?), partly because it's not clear how you'd use such info to make decisions about what to accept, partly because it's even less clear how you'd detect lying. Look at the archives of the various DKIM lists and you'll see ideas like this flogged to death multiple times. ARC basically starts with DKIM and adds something sort of like a DKIM version of SRS, showing you the path the message took, not much about what's in the message. R's, John _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
