Free tool

SPF checker.
Every include, every lookup.

Reads a domain's SPF record, follows every include, counts the DNS lookups against the limit of 10, and explains each part in plain English.

No account required to use this tool.

New to SPF? Read how SPF records work. Add this checker to your site

Every domain's email records, in one place.

Lemon Domains keeps every domain in one list across registrars, so you know which ones send mail and need these records.