Re: 3 bugs in Rmail

[Glenn Morris]

>> * I want "To" listed before "CC"

Turns out this is a message.el bug.

rmail-start-mail calls compose-mail with
OTHER-HEADERS = '(("in-reply-to" . <in-reply-to>) ("cc" . <cc-string>)
    ("references" . <ref-string>))

The doc of compose-mail says:

      OTHER-HEADERS is an alist specifying additional header fields.
      Elements look like (HEADER . VALUE) where both HEADER and VALUE
      are strings.
      ^^^^^^^^^^^
so rmail is doing the right thing.

With message-user-agent, compose-mail calls message-mail.
This however expects OTHER-HEADERS to have elements of the form
(SYMBOL . VALUE). This is in contradiction to the doc of compose-mail.


The funnt header order comes from the fact that message-mail passes
the headers through to message-setup and message-setup-1. The latter
basically inserts headers in the order specified by
message-header-format-alist. Any elements not present in that list are
inserted first. Since the elements of message-header-format-alist are
symbols and the test is done with assq, the strings "cc" and
"in-reply-to" are not found in that list and so end up being inserted
first in the reply buffer.