On Tue, 17 Oct 2000 12:13:43 +1100, Michael Shannon <[log in to unmask]>  said:
> When LISTSERV looks at an email header what RFC822 field does it search to
> decide who is sending it: FROM, REPLY-TO, PATH, or SENDER?  I'm assuming
> that it looks in the FROM field but I'd just like a confirmation of this.
>
> The reason I'm asking is that I have a subscriber who is unable to send
> commands to LISTSERV.  I've checked his subscription details and they seem
> OK.  I then checked his email headers to see what they contained.  I noticed
> that he's got different entries in FROM and REPLY-TO.  The FROM address is
> the same as the subscribed address so I'm at a loss as to why he can't issue
> commands.

If there is a Sender: field as well, Listserv will take that in preference.
I found this out the hard way - MH on Unix kept putting in a Sender: because
I had provided a From: field different from my Unix login.  As a result, I
had to put both my user-friendly and actual user@node addresses in the
POSTMASTER variable.

(For the curious, nmh 1.0.4 provides a 'masquerade' option to disable
the addition of Sender:)

--
                                Valdis Kletnieks
                                Operating Systems Analyst
                                Virginia Tech