Free SPF Checker.
Check your domain’s SPF record in seconds. Validate allowed senders, review SPF mechanisms, and troubleshoot email authentication issues before they impact deliverability.
SPF Checker.
How does SPF Checker work?
Enter a domain name (e.g., example.com) and click “Check”. Our tool looks for SPF data (typically stored as a TXT record) and breaks it into readable parts—so you can quickly confirm which servers are allowed to send email for your domain.
What is SPF?
SPF (Sender Policy Framework) is an email authentication method that lists which servers are allowed to send email on behalf of your domain. Mail providers use SPF to detect spoofing and reduce phishing.
When should you check SPF?
- When emails land in spam or get rejected
- After adding a new email provider (Google Workspace, Microsoft 365, SendGrid, etc.)
- When setting up a custom “From” domain for a tool
- After DNS or nameserver changes
SPF basics (quick guide)
v=spf1: SPF version tag (usually required)
include: Authorizes another provider's sending servers
ip4/ip6: Authorizes specific IPv4/IPv6 addresses
all: Default rule (e.g., -all fail, ~all softfail)
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Start monitoring for freeFrequently asked questions.
How do I check the SPF record for my domain?
Enter your domain above and click Check. We’ll find your SPF policy (usually published as a TXT record) and display it in a readable format.
What does a “good” SPF record look like?
Most SPF records start with
v=spf1, list allowed senders (likeinclude:orip4:/ip6:), and end with an “all” policy such as~allor-all.Should my SPF end with
~allor-all?~allis a softer policy (better for testing), while-allis stricter and tells receivers to reject unauthorized senders.Why does my SPF check fail with “too many DNS lookups”?
SPF evaluation is limited to 10 DNS lookups; lots of
include:(and mechanisms likea/mx) can push you over the limit and cause failures.Does SPF validate the “From” address people see in Gmail?
Not directly—SPF checks the envelope sender domain (often shown as Return-Path), while DMARC is what ties SPF/DKIM back to the visible “From” via alignment.
Can I have more than one SPF record?
No—having multiple SPF records on the same hostname can break evaluation. Combine everything into a single SPF policy.
What SPF record should I use for Google Workspace or Microsoft 365?
Google Workspace typically uses
v=spf1 include:_spf.google.com ~all, and Microsoft 365 commonly requiresinclude:spf.protection.outlook.comin your SPF record—combine them into one SPF record if you use both.
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