opendmarc: opendmarc (DMARC milter and library) opendmarc: opendmarc: OpenDMARC is a free open source software implementation of the DMARC opendmarc: specification. opendmarc: opendmarc: Homepage: http://www.trusteddomain.org/opendmarc/ opendmarc: opendmarc: opendmarc: opendmarc: opendmarc: