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Maileroo Mail Tester vs Mail Tester: catalog facts
Maileroo Mail Tester	Mail Tester
Free The tester is free and runs one test at a time; Maileroo's sending service is a separate…	Free Running a test from the website is free.
Web	Web
Tests a real delivered message rather than only the DNS records Shows SPF evaluation traces and every DKIM signature	No setup beyond sending one email to a given address Simple score out of 10 that is easy to read
Only one test at a time on the free tool The page also promotes Maileroo's commercial sending service	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
Not stated if an account is 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.