[Mailman-Users] Postings being discarded due to DKIM failures?

Robert Heller heller at deepsoft.com
Fri May 16 04:36:25 CEST 2014

At Thu, 15 May 2014 18:36:05 -0700 Mark Sapiro <mark at msapiro.net> wrote:

> On 05/15/2014 05:38 PM, Robert Heller wrote:
> > 
> > It wasn't any of these. I believe I have figured out what happened. The poster
> > did something 'bad': instead of creating a fresh message he located an old
> > message with a return address of the list and did a reply and then edited
> > *some* of the headers: only some of the  'visible' ones and did not delete the 
> > 'hidden' ones,  which confused the list server. 
> > 
> > I discovered this when saw dkim log messages suggesting that the server the 
> > message came from might be pretending to be my server and then when I looked 
> > at the headers of another message from this poster that had headers it should 
> > not have had.
> The only header that should cause an automatic discard is X-BeenThere:
> with the list's posting address. MUA's will normally not copy this into
> a 'reply', so the poster must have generated the reply in some other way
> like 'bounce' or 'remail' to the list.

I don't know *exactly* what he did, but 'bounce' or 'remail' are probably 
likely. I suspect it is a case of having learned how to use a hammer, it was 
easier to just use a hammer for everything, not just nails, but screws, nuts, 
bolts, etc. :-)  The poster is now investigating the new world of the 'address 
book' as a way of keeping track of possible addresses to use to send 


Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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