Services
Blacklist monitoring
Keep your IP addresses clean and deliverable. We check them against 10+ blacklists, continuously and in full every day, and run an abuse mailbox that forwards each report to the right client.
Features
What we offer
For any space you control, leased from us or held yourself.
Blacklist checks
We check your addresses against 10+ blacklists, Spamhaus among them: continuously, and in full once a day.
Listing alerts
We tell you when one of your addresses is listed, and again when it is delisted.
Help with delisting
Where a list allows it, we help get an address off it, and we tell you what each list asks for.
How it works
Abuse mailbox forwarding
When several clients or tenants use your space, abuse reports pile up. Our abuse mailbox receives them all and forwards each one to the client the affected range belongs to.
You set the rules by IP block, client or tenant, so each party gets only the reports about its own space.
Example forwarding setup
| Reports about | Forwarded to |
|---|---|
| 192.0.2.0/24 | client-a@example.com |
| 198.51.100.0/24 | client-b@example.com |
| Everything else | abuse@yourdomain.com |
Included
Service includes
- Listing and delisting alerts
- Help with delisting, where the list allows it
- 10+ blacklists, checked continuously and in full every day
- An abuse mailbox that forwards each report to the client it concerns
Background
Why reputation is the thing that actually breaks
An IP block that routes perfectly can still be useless. If it sits on a major blacklist, mail silently disappears, sign-up flows start failing, and the support tickets arrive before anyone internally knows why. The address space is fine; its reputation is not.
Listings rarely announce themselves. Most blacklists have no obligation to notify you, and the first signal is usually a customer complaining that something stopped working. By then the listing may be days old and the delisting queue longer than it needed to be.
Monitoring exists to close that gap. Knowing within hours rather than weeks is the difference between a quick delist request and a drawn-out argument about whether the problem has been fixed.
Contact
Want to keep your IP space clean?
Tell us which ranges you want monitored and how abuse reports should be routed to your clients. We usually reply in 1-3 business hours.
FAQ
Monitoring questions
Which blacklists do you monitor?
The major ones that actually affect deliverability and access, including Spamhaus's blocklists and the other widely enforced blacklists, more than ten in total. We focus on lists that networks genuinely filter against rather than inflating the count with obscure ones nobody honors.
How quickly will I know about a listing?
We watch your addresses continuously and check them in full every day, and an alert goes out when a status changes, so you usually hear about a listing within hours rather than when a customer notices. A delisting alert tells you when the problem is resolved.
Can you get addresses delisted for me?
We help where the list allows it. Some accept a straightforward request once the underlying cause is fixed; others require evidence, and a few impose fixed waiting periods no one can shorten. What we can always do is tell you which category you are in rather than leaving you guessing.
How does the abuse mailbox work?
You get a dedicated address that receives abuse reports for your space. Forwarding rules route each report to whoever is responsible, whether by IP block, by client, or by tenant, so the right party gets it without you reading every message first.
Does this work for space I did not get from you?
Yes. Monitoring and the abuse mailbox work on any IPv4 or IPv6 space you control, whether you lease it from us, bought it elsewhere, or hold it directly.
What if my own customers cause the listings?
That is the common case for anyone subletting space, and it is exactly what the forwarding rules are for. Reports reach the responsible tenant directly, which shortens the time to a fix and gives you a record of who was notified and when.
Services
Related services
Other ways we help with IPv4 address space.
Buy IPv4
Purchase IPv4 address blocks outright
Lease IPv4
Rent IPv4 addresses on flexible terms
GRE tunneling
Your IPv4 space, routed to your own servers

Further reading
IP reputation: how to keep an IP block clean
A block that routes perfectly can still be useless if it is listed. What a listing breaks, why addresses get listed, and how to find out first and stay off.
Read more