Blacklist monitoring across 6 domain blacklists
Which blacklists InboxLee monitors, why domain lists only, and what to do on a hit.
On this page · 3
- Sources we monitor
- Why no IP blacklists
- On a hit
There are over 100 publicly tracked blacklists. Most have negligible impact on cold-email placement. InboxLee monitors six of them - the domain-level lists that matter for a sending domain. Every domain in your workspace is checked once a day.
Sources we monitor
Why no IP blacklists
The checks are domain lookups: we query your domain against each zone. IP-level lists (Spamhaus SBL, XBL and PBL, Barracuda, SpamCop, SORBS and the rest) are not checked, and for shared-tenant Google Workspace or Microsoft 365 sending they would not tell you much anyway - the sending IPs belong to the provider, are shared across thousands of tenants, and you cannot act on them. Your domain is the reputation surface you actually control.
On a hit
A new listing raises a dashboard alert and fires the blacklist.hit webhook if you have an endpoint subscribed. The alert names the source, the affected domain, and the delisting URL for that list.
Most listings auto-clear after 24-72 hours of clean sending behavior. Spamhaus listings sometimes require a manual delisting request; the alert links to the Spamhaus lookup and removal page. Once a removal request is filed, a daily job closes it out the first time the next morning poll comes back clean, and emails you - you do not have to keep checking.