On Tue, 30 Oct 2007, W B Hacker wrote: > > would exim add a second header or > > Yes.
I suppose the question this raises is how does anything downstream looking at Precedence: header content interpret two such headers? I'm not really expecting an answer, but the original poster might want to consider and maybe investigate what Exchange does with mail that has two Precedence headers: one from the original mail with a value other than "(bulk|junk|list)", plus one added by his Exim with one of those values. Which does Exchange believe? And does the order they appear in the headers matter? (I note that RFC 2076 describes the use of Precedence header as "Non-standard, controversial, discouraged", although clearly it has extensive use via mailing list managers and the like. It also mentions the example value of "first-class", which I have never noticed). I hadn't actually considered using this header to help Exchange keep a lid on autoresponses to messages found to be spam, so this in itself is interesting. I think my approach would be to: 1. make the assumption that no end client really uses a value of Precedence: that is other than bulk|junk|list, especially if the message is likely to be spam 2. rename any existing Precedence: header to be X-Precedence: or something, so at least its original value is preserved somewhere if the user really wants to see it 3. then let Exim add "Precedence: bulk" to allow Exchange to detect it. However, I see from: http://msexchangeteam.com/archive/2006/10/06/429115.aspx that Exchange 2007 will also not reply to a message with a header "X-Auto-Response-Suppress: OOF", so this may be a solution more palatable to the original poster. Shame - it would have been a good opportunity for Exchange to promote the use of the (standard) Auto-Submitted header rather than create yet another one. (Other potential for "X-Auto-Response-Suppress" appear to be "DR" and "AutoReply", comma-separated where several are needed, but documentation appears to be sparse. DR == Delivery Report??). Jethro. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Jethro R Binks Computing Officer, IT Services University Of Strathclyde, Glasgow, UK -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
