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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!plus5!hokey
From: hokey@plus5.UUCP (Hokey)
Newsgroups: net.mail,net.mail.headers
Subject: Re: From lines in mail headers
Message-ID: <757@plus5.UUCP>
Date: Sun, 26-May-85 12:30:14 EDT
Article-I.D.: plus5.757
Posted: Sun May 26 12:30:14 1985
Date-Received: Mon, 27-May-85 00:36:58 EDT
References: <487@bonnie.UUCP>
Reply-To: hokey@plus5.UUCP (Hokey)
Organization: Plus Five Computer Services, St. Louis, MO
Lines: 33
Xref: watmath net.mail:869 net.mail.headers:448

In article <487@bonnie.UUCP> jww@bonnie.UUCP (Joel West) writes:
>	(sample #7)
>From uucp Fri May 10 01:07 EDT 1985
>>From cbosgd.ATT.UUCP!db  Fri May 10 01:07:10 1985 remote from cbosgd
>From: db@cbosgd.ATT.UUCP (Dave Bursik)

There is no redundant cbosgd in the >From line.  The first cbosgd is part
of a domain address, and can only be sent directly to sites which know
how to handle it.  By prepending the domain name with the name of a site
which *can* handle the domain name (in this case, the site happens to be
the same one as that represented by the domain name), a good route is
preserved.

>In particular, isn't the >From line redundant to an honest-to-goodness
>RFC822-std From: line (which I assume has been assaulted by each and
>every mailer along the way).  Is it necessary to include both of these
>first two "From" lines (I'm writing my own mailer to drop mail at a
>sendmail site, so the question is not academic).

The >From lines trace a *route*, while the From: line is (almost always)
an *address*.

If you are invoking sendmail directly, you can only pass a single "From "
line, so you will have to "crush" all >From lines into a single line.
The biggest problem with this is that timestamp information is lost.

Someday I hope to write some code to move the timestamp information into
a Received: line (or something similar).  (One must take pains to avoid
creating duplicate Received: lines.)

-- 
Hokey           ..ihnp4!plus5!hokey
		  314-725-9492