Q&A | Email Authentication

Q: Dear EmailKarma,

Where can I find the most updated information on how to properly set up SPF records, Domain Keys, and DKIM? Also, would you know what the exact difference is between Domain Keys and DKIM?

A: The best locations for SPF and Sender ID information are straight from the respective project web sites.

• OpenSPF
• Sender ID

When prepairing to launch authentication for these two services it best to;

• Have your mailserver list ready and researched, and use the record wizard (SPF, SID)
• Roll out with a “~all” flag to test your configuration
• Move to a “-all” flag once your testing is completed
• Publish these records for all of your domains, don’t forget your corporate domain.

As for the difference between Domain Keys and DKIM the project site dkim.org provides a great FAQ answering this question.