Thank you, Michael.

"sender=list" appears to have done the trick (messages are no longer
flagged as suspicious by hotmail).

Thanks to all who responded!

Arthur

-----Original Message-----
From: LISTSERV site administrators' forum
[mailto:[log in to unmask]] On Behalf Of Michael Loftis
Sent: Friday, January 29, 2010 9:49 PM
To: [log in to unmask]
Subject: Re: "On Behalf Of"

Configuration keyword sender=list
------Original Message------
From: Dennis Boone
Sender: LISTSERV site administrators' forum
To: [log in to unmask]
ReplyTo: LISTSERV site administrators' forum
Subject: Re: "On Behalf Of"
Sent: Jan 29, 2010 21:26

 > "From: LISTSERV site administrators' forum
 > [[log in to unmask]]; on behalf of; xxxxx, xxxxx
 > [[log in to unmask]]
 >  To:  [log in to unmask]
 > ..."

 > As opposed to:

 > "From:  [log in to unmask]"
 > To:     Listname@..."

Outlook uses that format to display messages which have Sender:
headers.  LISTSERV puts the poster's name/email in a Sender: header.
You may be out of luck.

De