On 11/16/2014 02:45 PM, John R Pierce wrote: > the other important feature the new mailman has is to munge the From: > field if the user's DNS has the DMARC records indicating a draconian > policy. Grrr, yes, of course, DMARC likes to check the From: header now (utterly stupid). Anyways, it should be possible to rewrite this with header_checks as well. I would tack @centos.org onto the end of the domain and call it a day. Peter