Quoth Philip Hazel on Mon, Dec 13, 1999: > I suppose that now Exim is also used on non-shared systems, I should
> provide an option for not adding Sender.
It would probably be better to write a system filter that checks
the validity of the From: header (so, for example, user vadik
will be able to send mail as "vadik-something@domain", but not as
"anyone-else@domain") and removes the Sender: header if
successful.
OTOH, the From: header may contain more than one address, as per
RFC 822, in which case the Sender: header specifies which one of
the people listed in From: actually sent the message.
