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MXToolbox vs Maileroo Mail Tester: catalog facts
MXToolbox	Maileroo Mail Tester
Freemium Lookups on the site are free to use, with paid plans offered alongside.	Free The tester is free and runs one test at a time; Maileroo's sending service is a separate…
Web	Web
Many email and DNS checks in one place MX lookups query the authoritative server directly	Tests a real delivered message rather than only the DNS records Shows SPF evaluation traces and every DKIM signature
Pages carry prompts for the paid service Each check runs separately rather than as one combined report	Only one test at a time on the free tool The page also promotes Maileroo's commercial sending service
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.