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MXToolbox Blacklist Check vs GlockApps: catalog facts
MXToolbox Blacklist Check	GlockApps
Free The blacklist check is free to use on the website.	Freemium A free spam checker and DNS record checkers are available; full placement testing and…
Web	Web
Checks over 100 DNSBLs in one pass Accepts an IP address or a domain	Shows inbox or spam placement across major mail providers Checks SPF, DKIM and DMARC alongside blocklists and spam score
Covers fewer lists than some dedicated multi-RBL tools Shows listings but does not remove them	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
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.