SPF record generator

Builds an SPF record from the senders you use, and works out what it really costs: every include is resolved so the ten-lookup limit is counted properly, not just the terms on the surface.

Domain

Who sends mail as this domain

These include values were read from the published records of real customers, not from memory.

Google WorkspaceMicrosoft 365SendGridAmazon SESMailgunPostmarkMailchimpMandrillZendeskSalesforceMarketoZoho MailProton MailFastmailMigadu

Anything else — one per lineYour own servers as ip4: or ip6:, or an include your provider gave you. ptr is left out on purpose; RFC 7208 says not to use it.What to say about everyone else

The record is built in your browser. Domain lookups go to Cloudflare’s DNS resolver and nowhere else — nothing you type is sent to a server of ours.

Analyze your first header in seconds

No account, no upload, no waiting. Paste a header and get a verdict.

Open the analyzer

mailauth

Email header analysis that never leaves your browser.

v1.119.1

Analyze

Header analyzer Domain Check Domain analyzer SMTP Error Lookup

Tools

SPF record DKIM key DMARC policy MX records Blacklist check BIMI check All tools

Set up

SPF generator DMARC generator DKIM setup MX setup BIMI setup

Learn

How it works Get headers Glossary Sources

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