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DKIM Validator vs MailGenius: catalog facts
DKIM Validator	MailGenius
Free Free to use.	Free Free to use.
Web	Web
DKIM, SPF and SpamAssassin results in one place Tests real mail flow rather than just DNS records	Checks SPF, DKIM and DMARC together Flags content that may trigger spam filters
Test messages are stored on a third-party server Only checks messages you send to it	Requires sending a message to a third-party service Site uses bot verification before loading
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.