What tools check SPF records?

SPF validation tools:

MXToolbox SPF Lookup: mxtoolbox.com/spf.aspx - checks syntax and lookup count.

Kitterman SPF Validator: kitterman.com/spf/validate.html - detailed evaluation with lookup counting.

dmarcian SPF Surveyor: dmarcian.com/spf-survey - visual lookup tree, identifies problems.

Command line:

dig TXT yourdomain.com

What tools check:

Syntax validity

DNS lookup count (10 limit)

Nested include expansion

Policy completeness

Run validation after any SPF change. Catch errors before they affect mail.

Document validation services. Check your credentials are properly formatted and complete.