Ok I admit it - I am a DMARC advocate, evangelist and all round believer in this standard.
So what is DMARC ?
This short video presents an overview of DMARC -- the technology of Domain-based Message Authentication, Reporting and Conformance. DMARC brings new features to the world of email, and is aimed squarely at solving a problem that has plagued email from the very beginning: There isn’t a reliable way to tell if email is real or just a really good fake.