How to set envelope sender (MAIL FROM) using exim

[Thomas Pircher]

Longman wrote:
> Is it correct behaviour for a system to say it was received from the
> address cited in the return-path as opposed to the one in the From?

As I understand it, the return-path is only used by MTAs to send error
notifications. For example your MTA receives a mail from the clug mailing
list with <tehpeh at gmx.net> in the From: field. If your MTA is not able to
deliver the mail to you for some reason, I don't want to be notified for
this, but clug's Mailman might. In this case it makes sense to have From:
and return-path different.

Or do you mean if the return path can show up in the mail user agent? I
think the return path generally thrown away as soon as the mail is
successfully delivered.

Thomas