Re: posting-styles and Return-Path:?

[Karl Kleinpaste <karl@charcoal.com>]

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Pavel.Janik@linux.cz (Pavel Janík ml.) writes:
> So when I'm in folder Incoming, I'd like to send mail with From:
> Pavel@mydomain.cz in headers. Ok, it works, but when this mail is sent, it
> has this line in the header:
> Return-Path: <Pavel.Janik@linux.cz>
> I do not want it.

This is due to sendmail, not Gnus.

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Return-Path is an MTA¹-generated header; it is added at the final
delivery stage to a local mailbox.  Sendmail intuits to the best
extent it can who the real, genuine, originating user is.  Since Gnus
is invoking sendmail directly, sendmail has ample opportunity to
figure out who you really are, and where sendmail itself is really
running, in opposition to your posting-styles preferences.

The only way to avoid this intuition on sendmail's part is not to let
sendmail be executed directly by Gnus.  I believe that smtpmail.el may
accomplish what you need, by speaking SMTP to your system's sendmail,
avoiding sendmail having an opportunity to think about who you really
are.

--karl

¹ Mail Transfer Agent, such as sendmail, MMDF, or qmail.