Re: Disable generation of "Sender: " by default.

[Harry Putnam <reader@newsguy.com>]

Per Abrahamsen <abraham@dina.kvl.dk> writes:

> Jesper Harder <harder@ifa.au.dk> writes:
> 
> > Or maybe disable it only for mail, which won't break anything.
> 
> Yep.  But as far as I can see, I don't get a "Sender: " in my mail,
> and I don't understand why.  'message-syntax-checks' is nil, and I'm
> posting from another machine than my mail address.  So I do not dare
> touch the code.

There have been long and bitter discussions about the `sender' line
here and on gnu.emacs.gnus  going back a year or two,  back then it
was generally presented as a `bad' thing to disable generation of
sender.

Respected posters advocated against hotly.  But apparently things have
changed in the way mail is processed since then and the sender line
doesn't play the same role it once did.

Not so long ago someone advocating: 
(setq message-syntax-checks '((sender . disabled))), openly would 
have been called to task...

What has changed for this attitude to have relaxed or disappeared?