BLACKLIST CHECK // 130+ LISTS
Blacklist Check: Your IPs and Domains Against 130+ Lists
A single Spamhaus listing can halve your inbox rate overnight, while a listing on an obscure hobby blocklist changes nothing. The Inboxes blacklist check screens 130+ lists and, just as important, tells you which hits actually matter.
Inbox placement
54%
··%
· ·
Authentication
checking 130+ blacklists
Sample data. Seed results are estimates, not guarantees.
What is a blacklist check?
A blacklist check looks up your sending IPs and domains against the DNS blocklists that mailbox providers and spam filters consult before accepting mail. Inboxes checks 130+ lists: the ones that genuinely move placement, like Spamhaus SBL and DBL, SpamCop, and Barracuda, and the long tail that mostly does not, with each hit weighted so an obscure listing does not trigger a false alarm. Monitoring runs continuously, alerting you within hours of a new listing and pairing every hit with delisting guidance for that operator, from Spamhaus's evidence-based removal process to SpamCop's automatic 24-hour expiry. A clean result does not guarantee the inbox, and Inboxes is built for legitimate senders fixing real problems, not for getting listed spam delivered anyway.
What you get
Blacklist check, done properly
Weighted, not just counted
Being on 3 of 130+ lists means nothing without context. Each list is graded by real-world impact, so a Spamhaus DBL hit screams and a dead hobby list whispers.
IPs and domains together
Modern filtering is domain-first: you can be clean on every IP list and still sit on a URI blocklist like the DBL. Both dimensions are checked in the same pass.
Alerts measured in hours
The gap between getting listed and finding out is where reputation damage compounds. Continuous monitoring closes it to hours, not the weeks a bounced campaign takes.
Delisting that actually works
Every operator has its own process: forms, evidence, timed expiry. Each hit links the correct path, plus what to fix first so the listing does not come back.
How it works
From send to fix list in four steps
Add your senders
Register the domains and IPs you send from; shared ESP pool IPs are picked up from your placement test headers automatically.
Run the sweep
All 130+ lists are queried in minutes, with results grouped by impact tier.
Resolve any hits
Follow the per-operator delisting guidance, and fix the root cause the listing points at.
Stay monitored
Re-checks run continuously; a new listing pages you long before subscribers notice missing mail.
The honest boundary: seed results are directional estimates and nobody can guarantee inbox placement. Inboxes finds the fixable causes, tells you exactly what to change, and monitors the result. No warmup networks, no bot opens, ever. Full detail on the methodology page.