Daily blacklist monitoring is live
Daily checks against the six domain blacklists that actually move cold-email placement. Per-domain visibility on every domain in your workspace.
The InboxLee TeamToday's release adds blacklist monitoring to every domain in your InboxLee workspace. Daily DNSBL lookups across six domain blacklists, surfaced as a clean trend on the dashboard.
Sources monitored
- Spamhaus DBL - dbl.spamhaus.org
- SURBL - multi.surbl.org
- URIBL Black - black.uribl.com
- URIBL Grey - grey.uribl.com
- Nordspam DBL - dbl.nordspam.com
- Invaluement URI - uri.ivmuri.dnsbl.invaluement.com
Why these specifically
There are over 100 blacklists publicly tracked. Most have negligible impact on cold-email placement, and a large share of them list IP addresses - which is the wrong unit for senders on shared Workspace and M365 infrastructure, where the IPs belong to Google and Microsoft. These six are domain blacklists: they list the sending domain, which is the part you own and the part that follows you across providers.
What is not covered
IP-based lists (Spamhaus SBL/XBL/PBL, Barracuda, SpamCop, SORBS and the rest) are not checked. Nothing in InboxLee queries an IP. If you move to dedicated IPs later, that is a separate monitoring problem and a separate feature.
How alerts work
A new listing on any monitored source triggers an immediate dashboard alert and an optional email or webhook. The alert includes the source, the affected domain, and a recommended remediation path (delisting, sender pattern review, mailbox suspension if compromise is suspected).
Frequently asked
Which email blacklists actually matter for cold email?
If you send through shared Workspace or M365 infrastructure, the domain blacklists are what matter - the IPs belong to Google and Microsoft and are already trusted. The six that move placement on Gmail, Workspace, M365 and Yahoo are Spamhaus DBL, SURBL, URIBL Black, URIBL Grey, Nordspam DBL and Invaluement URI. IP-based lists (Spamhaus SBL/XBL/PBL, Barracuda, SpamCop, SORBS) matter only once you run dedicated IPs.
How does InboxLee blacklist monitoring work?
A daily DNSBL lookup against six domain blacklists for every domain in your workspace. A new listing triggers an immediate dashboard alert plus optional email or webhook. The alert includes the source, the affected domain, and a recommended remediation path (delisting submission, sender-pattern review, mailbox suspension if compromise is suspected). IP addresses are not checked - InboxLee monitors domains only.
What should I do if my cold-email domain gets blacklisted?
Three immediate steps: pause sending from the affected domain, submit a delisting request to the listing source (Spamhaus has the highest impact and a working delisting form), and audit recent campaigns for the trigger (list quality, sudden volume, content patterns). Most delistings clear within 1 to 7 days. Sustained reputation damage may require a 30-day recovery playbook.
Does an IP blacklist hurt me if I am on shared infrastructure like Google Workspace?
IP blacklists matter much less for shared SaaS senders because Workspace and M365 share IPs across thousands of tenants - the IPs are already trusted by major receivers regardless of any single tenant's reputation. Domain blacklists (Spamhaus DBL, SURBL) are what cold-email operators on shared infrastructure need to watch.
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