Skip to main content


Email Security Insights

A user once asked:

I can’t seem to find the answer to this question anywhere on the internet (it may just be me not fully understanding the standards), so I thought I’d ask you. If I have DMARC set up in my DNS (which I do) and also ADSP (also do), which one takes precedence? I’m also assuming that I am in overkill mode and that DMARC is enough. Your input would be appreciated when you have a moment.

About ADSP

  1. No one implements ADSP.  It is dead tech.
  2. DMARC is considered by most to be a superset of ADSP.  See section “A.5. Issues With ADSP In Operation” of RFC 7489.

Given the above, we suggest removing your ADSP records to prevent the few sites that do implement it from doing the wrong thing.

We’re Here to Help

With a team of email security experts and a mission of making email and the internet more trustworthy through domain security, dmarcian is here to help assess an organization’s domain catalog and implement and manage DMARC for the long haul.

You can get in touch with us or register for a free trial where our onboarding and support team will help you along the way.

Want to continue the conversation? Head over to the dmarcian Forum.