SPF checker
SPF checker for sender authentication
SPF helps mailbox providers understand which servers are allowed to send mail for your domain. Use it with DKIM, DMARC, and inbox placement monitoring for a clearer deliverability picture.
What SPF checksAn SPF record lists approved senders for your domain, such as your email platform, CRM, or transactional email provider.Why SPF mattersIf SPF is missing or misconfigured, mailbox providers may distrust your messages and route more mail to spam.What to do nextPair SPF checks with DKIM, DMARC, blacklist monitoring, and inbox placement tests to diagnose the full deliverability path.
What SPF checks
An SPF record lists approved senders for your domain, such as your email platform, CRM, or transactional email provider.
- Authorized sending services
- Potential missing includes
- Record format issues
Why SPF matters
If SPF is missing or misconfigured, mailbox providers may distrust your messages and route more mail to spam.
- Supports authentication
- Reduces spoofing risk
- Helps sender reputation monitoring
What to do next
Pair SPF checks with DKIM, DMARC, blacklist monitoring, and inbox placement tests to diagnose the full deliverability path.
- Check DKIM selectors
- Review DMARC policy
- Run an inbox placement test
Ready to check your deliverability signal?
Start with a free check, then upgrade when you need ongoing monitoring, reports, and alerts.