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MXToolbox Blacklist Check vs MXToolbox: catalog facts
MXToolbox Blacklist Check	MXToolbox
Free The blacklist check is free to use on the website.	Freemium Lookups on the site are free to use, with paid plans offered alongside.
Web	Web
Checks over 100 DNSBLs in one pass Accepts an IP address or a domain	Many email and DNS checks in one place MX lookups query the authoritative server directly
Covers fewer lists than some dedicated multi-RBL tools Shows listings but does not remove them	Pages carry prompts for the paid service Each check runs separately rather than as one combined report
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.