On Sep 13, 2013, at 7:48 PM, Mark Sapiro <m...@msapiro.net> wrote: > On 09/13/2013 12:18 PM, Franck Martin wrote: >> >> Mailman breaks DKIM as soon as you add a footer or tag in the subject line, >> which a lot of lists do (including this one). > > > Not necessarily. It depends on the DKIM signature and how much of the > body is signed. Granted, you are correct in most cases, but it might be > of interest to some to go to > <https://mail.python.org/pipermail/mailman-developers/2007-February/> > and review the "dkim-signature headers" threads. > Unfortunately z= and especially l= are not used practically by senders because they create a risk. One could add an attachment containing malware to the message for instance.
Even cisco does not use them in its signatures anymore. Jim Fenton did a good document on DKIM threats: http://tools.ietf.org/html/rfc4686 _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org https://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9