May 26, 2018
DMARC library and milter implementation
OpenDMARC is an open source implementation of Domain-based Message Authentication, Reporting & Conformance, or DMARC. It builds on the successes of technologies such as DomainKeys Identified Mail DKIM and the Sender Policy Framework SPF to create an infrastructure that enforces policy on domain names that are visible to end users, and creates a feedback framework for identifying and tracking fraudulent use of domain names in email.
It includes a library for handling DMARC record parsing, a database schema and tools for aggregating and processing transaction history to produce DMARC reports, and a filter that ties it all together with an MTA using the milter protocol.