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DKIM Validator vs GlockApps: catalog facts
DKIM Validator	GlockApps
Free Free to use.	Freemium A free spam checker and DNS record checkers are available; full placement testing and…
Web	Web
DKIM, SPF and SpamAssassin results in one place Tests real mail flow rather than just DNS records	Shows inbox or spam placement across major mail providers Checks SPF, DKIM and DMARC alongside blocklists and spam score
Test messages are stored on a third-party server Only checks messages you send to it	Full seed-list testing requires a paid plan Aimed at bulk and marketing senders more than individuals
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 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.