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MXToolbox vs MXToolbox DKIM Lookup: catalog facts
MXToolbox	MXToolbox DKIM Lookup
Freemium Lookups on the site are free to use, with paid plans offered alongside.	Free The DKIM lookup is free to use on the website.
Web	Web
Many email and DNS checks in one place MX lookups query the authoritative server directly	Accepts two input formats for domain and selector Explains how DKIM record lookups work on the page
Pages carry prompts for the paid service Each check runs separately rather than as one combined report	You need to know the selector in advance Tests the published key only, not a signed message
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account 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.