Re: Thread extension weirdness

[Chris Newman]

Actually, MH can not claim compliance with RFC 2822 if it generates such headers. That syntax is in the obsolete syntax section of RFC 2822 which falls under a "MUST NOT generate" rule.

- Chris

begin quotation by Harald Tveit Alvestrand on 2003/1/13 12:12 +0100:

It's less irritating than the MH users who send "In-reply-to: Message
from <email@address> with message ID <msg@id>", causing the server to
thread all replies to the same person together (I regard it as a bug in
RFC 2822 that this is still legal, btw) - but it still violates the
principle of least astonishment.