Date: Wed, 4 Oct 1995 10:33:18 -0700 (PDT)
From: Mark Crispin <MRC@CAC.Washington.EDU>
Sender: Mark Crispin <mrc@Tomobiki-Cho.CAC.Washington.EDU>
Subject: Re:  What's the Sender header for?
To: Roger Fajman <RAF@CU.NIH.GOV>
Cc: drums@cs.utk.edu
In-Reply-To: <199510040225.WAA20817@CS.UTK.EDU>
Message-Id: <MailManager.812827998.29737.mrc@Tomobiki-Cho.CAC.Washington.EDU>
Mime-Version: 1.0
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For your information, Pine, MM, MS, MailManager, MM-D, are all known to
support both of these.  I have a list of several other mail programs that I
believe support this as well, but I haven't confirmed that yet.

On Tue, 03 Oct 1995  22:23:01 EDT, Roger Fajman wrote:
> (2) Some user agents allow the user to sent the From field to whatever
> they want.  This is useful when the address that one wishes people to
> use is one that goes through a forwarder (e.g., fajman@nih.gov). The
> utility of the Sender field in this context is that is can be used to
> indicate where the message really came from, so as to discourage
> forgery.
>
> I rarely see this usage.  One of the more popular user agents that
> permits the From field to be set by the user is Eudora.  We use Eudora
> a lot here and, at least as normally configured here, it does not put
> in a Sender header.  Probably it does not know what it should put into
> one.
>
> (3) A secretary might be sending mail on behalf of a boss.  In this
> case, the boss's address should go into From, and the secretary's
> address into Sender.  I don't know of a UA that makes this easy to do,
> but there must be something that does.  I rarely see it, however.