Path: utzoo!attcan!uunet!zephyr.ens.tek.com!tekgen!puffin!rad
From: rad@puffin.USS.TEK.COM (Richard Doty)
Newsgroups: comp.mail.misc
Subject: Re: user's aliases on the To: line (was: UUnet and munging headers.)
Message-ID: <6217@tekgen.BV.TEK.COM>
Date: 29 Jun 90 22:35:03 GMT
References: <6205@tekgen.BV.TEK.COM> <8aWqJZv0BwwOES_4p_@transarc.com>
Sender: news@tekgen.BV.TEK.COM
Reply-To: rad@puffin.USS.TEK.COM (Richard Doty)
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 45

In article <8aWqJZv0BwwOES_4p_@transarc.com> Craig_Everhart@TRANSARC.COM writes:
>First, let's point out that the proper syntax (1) requires commas
>between addressees and (2) requires host names on each addressee.  Thus,
>the example should be:
>
>	To: foo: user1@dom.one, user2@some.dom, user3@dom.xxx ;

I agree with the commas, but the individual destinations are
mailboxes, so I would think they could be local addresses, too.

>Having said that, what do you mean by ``get mail groups to work''?  What
>do you believe is supposed to happen?  What I believe should happen is
>that mail to the above list would be delivered to the three addressees
>``user1@dom.one'', ``user2@some.dom'', and ``user3@dom.xxx''.  And, yes,
>the addresses are supposed to stay intact in the actual message header
>text, though I suppose they wouldn't have to if you wanted your MUA to
>remove them.

According to RFC1123,
	 When a message is delivered or forwarded to each address of an
	 expanded list form, the return address in the envelope ("MAIL
	 FROM:") MUST be changed to be the address of a person who
	 administers the list, but the message header MUST be left
	 unchanged; in particular, the "From" field of the message is
	 unaffected.

That's what I expect to happen.

The only reference to list syntax that I am familiar with in sendmail.cf
is this from S3:
	R$+:$*;@$+              $@$1:$2;@$3             list syntax
	R$+:$*;                 $@$1:$2;                list syntax

So suppose my local mailer receives a message for

	bind-hacks:;@puffin.uss.tek.com

I am still not clear how people handle list format, without a unique mailer
definition (at the least).  Bill Wisner says list format is used commonly,
but I've never seen it so I guess I've been "haunting the wrong corners
of the Internet all this time..." :-)

Anyway, I'd still like to see a real code example.

Richard.