Hmm, that's supposed to turn it off completely. It's possible that it doesn't work with IETFHDR set, but I would be surprised if that were the case. I'll do some checking... Nathan At 03:50 PM 2/20/2008 -0500, Mark Berman wrote: >Nathan, > >I tried that. The "Sender:" line still came through. Is there some other >config parameter that might be overriding it? > > - Mark > >On Wed, 20 Feb 2008 15:34:24 -0500, Nathan Brindle <[log in to unmask]> wrote: > >>Sender= None >> >>At 03:23 PM 2/20/2008 -0500, you wrote: >>>Hi, >>> >>>I am trying to set up a series of lists meant to behave like sendmail >>>aliases. The idea is to have an address like [log in to unmask] and let >>>the department secretary control who gets mail sent to the address >>>(subscriber control). >>> >>>In general I've got this working. Setting "Default-Options=IETFHDR" helped a >>>lot. The problem is that certain email clients (meaning Outlook) take it >>>upon themselves to read the "Sender:" header line and display it in the >>>"From" field as "<Sender:> on behalf of <From:>. >>> >>>Seems like typical Microsoft making their own rules to me, but Outlook is so >>>common I have to deal with it. >>> >>>Thanks for any help. >>> >>> - Mark