Greg Hewgill (ghewgill) wrote,
Greg Hewgill

spf -all

A recent post by taral piqued my curiosity and made me wonder just how many domains publish "-all" (hardfail) in their SPF records. To that end, I have set up which aims to count them.

I am currently loading domains into the database. This involves a DNS lookup for each domain name, so it's only going at an average rate of a few per second. I have several million domain names ready to be loaded, so I expect the initial load to take a few weeks. I have grabbed domain names from the following sources so far:

If you can think of any other easily obtainable list of domain names, let me know!

And for what it's worth, the highest-alexa-ranked domain that publishes SPF -all is ...drumroll...


  • house is sold

    After six months of waiting, a flurry of bidding activity on a sunday evening a few weekends ago, followed by more waiting, our house has finally…

  • insight cruise control part 2

    More pictures... The Insight now has a newly installed cruise control system, which works great! ivo, decibel45, and…

  • insight cruise control system

    Since Amy and I are going to be driving on about a 5000 mile road trip in the near future (more about the details later), I ordered an…

  • Post a new comment


    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded