Features
Blacklist monitoring
Know about a listing before your mail starts bouncing.
Check any IP or domain against the major DNS blocklists on demand, or let monitors re-check them around the clock and tell you the moment something changes.
What you get
Lists ranked by how much they matter
Every list is tiered as critical, important or informational, so one stale hobby list doesn't look as serious as a major one.
Monitors that never forget
Add an IP, a domain or a whole server. We re-check on the interval your plan allows and keep the history.
Alerts where you already look
Email, Slack, Discord, Teams, Telegram or your own signed webhook, with a clear message and the delisting link.
Honest results
A list that refused our query or timed out shows as an error, not as clean. We never guess.
Private ranges stay private
Only public addresses are queried, and your targets are never shared with anyone.
Registered with your servers
Connect a server and its public IPs are monitored automatically.
How it works
- 01
Add what you want watched
Paste IP addresses or domains, or connect a server and we add its IPs.
- 02
We check on a schedule
Each target is checked against every enabled list, with results cached briefly to stay polite to the list operators.
- 03
You get the result and the fix
A listing triggers an alert with the list name, severity and where to request removal.
Questions
Which blacklists do you check?
The widely used DNS blocklists, grouped by how seriously mailbox providers treat them. The current list and each list's removal process are shown with every result.
Will checking an IP get it listed?
No. Checks are ordinary DNS queries from our own resolver, the same lookups mail servers make for every incoming message.
How often can I monitor?
The fastest interval depends on your plan and is set on the pricing page.
Other areas: SMTP and auth testing, Email validation, DNS authentication, PowerMTA servers, Deliverability analytics.
Start with the free plan
No payment details needed. Connect a server, check a domain and see what the tools tell you.