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From: Kai.Grossjohann@CS.Uni-Dortmund.DE (Kai =?iso-8859-1?q?Gro=DFjohann?=)
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Subject: Re: Sender header?
Date: 25 May 2001 18:49:15 +0200
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On 25 May 2001, Paul Jarc wrote:

> According to RFC 1036, Sender is for news more or less what Rat says
> it should be for mail - it's used for tracking down where a message
> entered the network.  So user-login-name@system-name is the right
> thing in that case.  Sender for mail is something completely
> different, and just happens to have the same name.

RFC 1036 has this example:

/----
|     For example, if John Smith is visiting CCA and wishes to post a
|     message to the network, using friend Sarah Jones' account, the
|     message might read:
| 
|               From: smith@ucbvax.Berkeley.EDU (John Smith)
|               Sender: jones@cca.COM (Sarah Jones)
\----

cca.COM doesn't look like the system name of any host.  So the
requirement for the rhs to be the system name would contradict this
example.

Also, I'm having difficulty finding support in RFC 1036 for Sender
addresses to be any different than other mail addresses (in
particular, the mail addresses in the From header).  There is a word
`verified' in there, but the RFC does not say what it means.  Also,
the intent of the whole thing seems to be that it is possible to send
mail to the address in the Sender header -- and if `user@host.dom.ain'
is not the right place to send email for mails, then it's not the
right place to send emails for news, either.

Or am I mistaken?  Maybe son or grandson have better information, but
I keep forgetting where to find them.

kai
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