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From: Claus =?iso-8859-1?Q?A=DFmann?= <ca+sendmail(-no-copies-please)@mine.informatik.uni-kiel.de>
Newsgroups: comp.mail.sendmail
Subject: Re: From: header gets changed.  Why?
Date: 5 Oct 2012 02:25:22 GMT
Organization: Institute of Computer Science, University of Kiel, Germany
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References: <slrnk6rjir.1lmn.hokan@woolly.ipshell.com>
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Hokan  wrote:

> From: townhall.brewerym

That is synctactically invalid. See RFC 822 (or one its successors).

> When the mail was delivered to me that header said

> From: townhall.brewe...@smtp-relay.enet.umn.edu

> Why did that From: get changed.  As the change was not useful, how
> do I make it not change.

By asking the sender to follow the rules (which are only known for 20
years or so, but it must be really hard to implement them...  which
probably is also due to the fact that sendmail 8 "repairs" all the
garbage that it is given -- sometimes with "interesting" results.)


BTW: there might be some option to prevent sm8 from adding its own
hostname to unqualified addresses, but I can't remember nor find it in
the docs right now.