Murray S. Kucherawy quotes Hector Santos:
I am trying to determine if Resent Headers, in particular the
What are you thoughts about this?
I don't know exactly what you mean by "applies" here.
Neither do I... but I'll opine anyway.
Resent-* is dying or dead; so much new software doesn't look at it that
Resent-* doesn't really "apply" to anything any more.
This isn't just about ignorant software. If you write an IMAP client in
a way that will make all the IMAP-heads smile at you, that client is
almost sure to ignore Resent-* (because IMAP's FETCH BODYSTRUCTURE
Hm. Do any well-known MUAs take Resent-Message-Id into consideration
when threading? I don't know, but I confess I haven't looked. I know
some that don't.