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Mail Tester vs LearnDMARC: catalog facts
Mail Tester	LearnDMARC
Free Running a test from the website is free.	Free Free to use; the site is sponsored by a DMARC monitoring service.
Web	Web
No setup beyond sending one email to a given address Simple score out of 10 that is easy to read	Tests a real message sent from your own mail setup Step-by-step visual explanation of alignment
Tests a single message rather than ongoing deliverability Little detail on the homepage about what each check covers	Full visual view needs a desktop screen Aimed at explaining one message rather than monitoring a domain
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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