Is your SPF record valid - see authorized senders before mail gets rejected or filtered.
Whether a TXT policy exists for your domain
Valid include and mechanism rules
Which servers may send email as you
No account required · Free · Results in under 1s
Email sender authentication explained
Missing or broken SPF records are a common reason legitimate email lands in spam - receivers cannot verify which servers may send as your domain.
An SPF checker reads the SPF TXT record and lists authorized senders, include lookups, and the fail policy (-all or ~all). A free SPF check helps you validate configuration after adding email tools.
Run a check after DNS changes or ESP onboarding. Add domains to TotalSiteControl monitoring for alerts when SPF records are modified or removed.
Free TotalSiteControl monitoring - email alerts, no credit card required.
Get notified when sender authorization records change.
Scheduled validation catches misconfigurations before mail is rejected.
See past SPF results for email infrastructure audits.
Instant results · No signup · Check anytime
It reads the SPF TXT record for a domain and shows which servers and services are authorized to send email on its behalf.
Yes. Check any domain instantly - no signup, no credit card, and no limit on one-off checks.
A DNS TXT record listing IP addresses and services allowed to send mail as your domain. It helps receivers detect spoofed messages.
Missing, invalid, or incomplete SPF records hurt authentication. Too many include lookups or a missing -all also reduce trust with receivers.
-all is hard fail - unauthorized senders should be rejected. ~all is soft fail - mark suspicious. Use -all only when your SPF list is complete.
No - only one SPF TXT record is allowed per domain. Merge all authorized senders into a single record.
SPF alone is not enough. Combine SPF, DKIM, and DMARC for the best protection against spoofing and spam filtering.
After adding email tools such as newsletters, CRM, or transactional ESPs. Monitoring catches accidental SPF changes.