SPF Checker
Looks up a domain's SPF record and lists its mechanisms (senders it authorizes).
Frequently asked questions
What is SPF, and why does it matter?
SPF (Sender Policy Framework) is a DNS record that lists which mail servers are allowed to send email for a domain. This checker looks up that record and flags common problems, like exceeding the 10-DNS-lookup limit that breaks SPF for many senders.
Is this free to use?
Yes, completely free, with no signup or account required.
Do you store the domains I check?
No. Each check is a live, one-time DNS lookup — we don't save what you type in.