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.
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