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Signal
Audit
Free email authentication tool
SPF Generator Wizard
Build an SPF record from the services that legitimately send mail for your domain.
Lookup
Generator Wizard
Raw Generator
Domain
Select every service that sends mail for this domain
Google Workspace
Microsoft 365
SendGrid
Mailchimp
Amazon SES
GoDaddy
Salesforce
Shopify
Zendesk
Additional include domains
Optional, separated by spaces
Policy for all other senders
Soft fail (~all) — transition
Hard fail (-all) — enforce
Neutral (?all) — observe
Generate SPF record
DNS changes can affect legitimate delivery. Verify every sender and stage enforcement policies before publishing.