Feature Requests item #1460796, was opened at 2006-03-29 17:04 Message generated for change (Comment added) made by ppsys You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=350103&aid=1460796...

Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Myke Olson (xpl0re) Assigned to: Nobody/Anonymous (nobody) Summary: Add option to remove Sender header

Initial Comment: When sending messages through mailman with Postfix, it adds a new header called "Sender" in addition to the Errors-To and Return-Path headers.

Outlook (probably mistakenly) sees the Sender header and treats it like gold. All messages show up in the user's mailbox as from list-bounces on behalf of therealperson. What's worse is that the rules/filters will only work on the list-bounces part and not therealperson.

If we could selectively turn off the addition of the Sender header (and be able to keep the other two), then we should still be able to use bounces but have Outlook be able to filter messages.

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Comment By: Richard Barrett (ppsys) Date: 2006-03-30 14:57

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RFC2822 (Para 3.6.2. - Originator fields) would suggest that simply not using the Sender: header when Mailman is the agent responsible for the actual transmission of the message is a breach of the RFC.

The problem with the behaviour of Outlook is discussed in the Mailman FAQ here: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq02.003.htp

A suggested code change which cosmetically improves the Outlook presentation by changing the Sender: header value from the listname- bounces alias to the listname alias is described there.

Paranthetically:

The Error-to: header is deprecated and only inserted for backward compatibilty with old/broken MTAs.

The Return-path is not a header that travels with the message and is known as a trace field. It is mandatory and normally inserted at the start of the message, as a header, by the final SMTP delivery MTA and is the value of the SMTP envelope sender.

As an aside, Outlook 2003 appears to allow filtering on the contents of From: header wihtout any problems (as opposed to the From field displayed on the GUI) and this does not involve the contents of the Sender: header.

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