Default for the envelope From in smtpmail.el

[Lars Magne Ingebrigtsen]

Currently, the default envelope from address (aka. SMTP "MAIL FROM") in
smtpmail is `user-mail-address'.  The user can change this by changing
some rather confusing variables called `mail-specify-envelope-from' and
`mail-envelope-from'.

I wonder whether a more sensible default here would be to use the From:
address in the buffer being sent.  Some MTAs filter on the MAIL FROM,
and only allow access based on a filter, and people adjust their From:
headers to reflect that.

For instance, when they are at work with their laptops, they use "From:
address@hidden", and at home "From: address@hidden".

I have no idea whether changing this default will break more stuff than
it would help, though.  Thoughts?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/