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LearnDMARC vs Mail Tester: catalog facts
LearnDMARC	Mail Tester
Free Free to use; the site is sponsored by a DMARC monitoring service.	Free Running a test from the website is free.
Web	Web
Tests a real message sent from your own mail setup Step-by-step visual explanation of alignment	No setup beyond sending one email to a given address Simple score out of 10 that is easy to read
Full visual view needs a desktop screen Aimed at explaining one message rather than monitoring a domain	Tests a single message rather than ongoing deliverability Little detail on the homepage about what each check covers
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 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.