>If I am not mistaken, it's a MTA and not a MLM that did that modification.
Right, it's Courier. DKIM has now been a published RFC for three years, and was in development for several years before that, and this is the first time we've run into this sort of incompatibility. Under the circumstances, the correct response is clearly to fix Courier so it doesn't mess with the mail headers it presents to milters rather than to modify DKIM and change every DKIM implementation in the world to work around it. R's, John PS: I think you'll find this is not the first time Mr. Courier has provided this sort of unasked help to his users. _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
