IIRC, the RFC-correct way would be

 From: Whomever_originated_this
 Sender: [log in to unmask], whose email client is preparing it
 Reply-to: Also you, probably redundant

I presume that Anne Mckevitt either (1) doesn't have an email
address, or (2) is you but that's not your email moniker.  If the
latter, there is a better way: check your mail client's preferences.

Nathan Brindle wrote:
>
> The "on behalf of" business is being added by your mail client when you
> "bounce" or "redirect" the message to the list.  LISTSERV isn't doing
> it (and can't remove it).
>
> Nathan

--
David A. Cobb, Software Engineer, Public Access Advocate
"Don't buy or use crappy software"
"By the grace of God I am a Christian man,
 by my actions a great sinner" -- The Way of a Pilgrim [R. M.
French, tr.]