Tag: DMARC

Authentication Failures

12 December 2017

On the fourth day of Listmas, my data showed to me four authentication failures… Hey, it’s a song, okay? So, there are a number of ways to go to get authentication failures. Not everybody checks authentication, we could still be counting either DomainKeys or SenderID, etc. But, honestly, this is day 4 because that’s just… Read More

Who Drives DMARC?

23 June 2016

Every time that someone comes up with a new way to talking about mail back channels it gets just a little more complex. First, we had SPF. That was a relatively easy thing. Add a text record to DNS that says where your mail is coming from and you’re set. You even had options to… Read More

Drafted for the wrong fight

8 March 2016

My friend Al Iverson just wrote a new blog post: “SPF Still Matters in 2016”. One of the things that he said struck a chord with me: “‘But SPF is worthless,’ occasionally a spam fighter will cry.” It struck a chord with me because SPF wasn’t ever really intended to fight spam, per se. While there is… Read More