Let’s not.

#DMARC adds value to email for very few entities and adds yet another way for email to break, if you let it. One of the hottest threads on the MailOp list right now is in regard to Mimecast mishandling mail in a way that breaks mail signatures, dependent on the encoding a MUA chooses for a message.

I have spent many hours debugging other people’s DMARC deployments. These are rarely billable hours and are deeply tedious. https://ioc.exchange/@percepticon/113347954887616002

#dmarc