On 14 Apr 2012, at 23:15, Jeremy Harris wrote: > On 2012-04-14 22:04, Michael J. Tubby B.Sc G8TIC wrote: >> One of the conditions that I'm not sure how we resolve (or even it it ever >> happens) is what we do if there are two signatures on an incoming message >> and one is good (pass) and one is bad (fail) - but I guess this is down to >> the ACL creator ;-) > > I'm not a DKIM user myself, but I see plenty of mails through my system > that are described exactly like that.....
That's quite a normal situation. Mailing lists tend to break DKIM signatures. However, it's recommended practice for a mailing list to add its own signature, and not remove the signature that it has just broken (e.g., by adding a footer to the message, or by adding a prefix to the Subject line). The broken signature is not removed because it carries potentially useful information, even though that information cannot be relied upon. -- Ian Eiloart Postmaster, University of Sussex +44 (0) 1273 87-3148 -- ## List details at https://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/
