Postmark is really nice indeed, even though a bit on the pricey side. Still, I can recommend their free tool to monitor DMARC: https://dmarc.postmarkapp.com/ h

Postmark is really nice indeed, even though a bit on the pricey side. Still, I can recommend their free tool to monitor DMARC: https://dmarc.postmarkapp.com/ https://dmarc.postmarkapp.com/