Why IPs typically get listed
Most listings happen because a server sent real spam, not because of a false flag.
A compromised mail server relaying spam without the owner's knowledge is a common cause.
An infected device on the same network can also push spam out through your server.
Bulk senders skipping proper opt-in and unsubscribe handling can trip the same filters.
Shared IP space is another factor, since another tenant's bad behavior can get your IP listed too.
Missing SPF or DKIM records make it easier for spammers to spoof your domain.
That spoofing can indirectly lead to a listing on either zone.
How to check if you're listed
Run your outbound mail server's IP through a DNSBL lookup tool that covers ImproWare's zones.
Check specifically for spamrbl.imp.ch and wormrbl.imp.ch, since they're tracked separately.
A listing on one doesn't automatically mean you're on the other.
Check both zones even if a bounce message only names one of them.
Try our Blacklist Monitoring tool for free today.
How to get removed
Removal for both zones goes through ImproWare's own antispam site.
Third-party lookup tools can't process removals themselves and point you back to the operator directly.
Start by fixing the root cause, whether that's a compromised account or an open relay.
Then visit ImproWare's antispam site and use the removal request process for your specific zone.
Spamrbl and wormrbl are tracked separately, so clearing one doesn't clear the other.
Submit a separate removal request for each zone you appear on.
You can only submit one removal request per IP address per week.
Don't resubmit right away if a request is still pending review.
How long it typically takes
ImproWare states that IP removals from its dnsbl services are free of charge.
Most removal requests are processed within 48 hours, according to the operator's own site.
Because you can only request once a week per IP, fix the cause before you submit.
FAQ
How do I run an ImproWare blacklist check?
Use any DNSBL lookup tool that supports custom zones and query it against spamrbl.imp.ch and wormrbl.imp.ch specifically. Not every generic blacklist checker includes ImproWare's zones by default. Confirm both zones are covered before trusting a clean result.
How do I remove an IP from ImproWare?
Fix the cause first, whether that's a compromised server or a missing authentication record. Then submit a removal request through ImproWare's own antispam site for the specific zone you're listed on. Requests are free and are typically processed within 48 hours.
Are spamrbl.imp.ch and wormrbl.imp.ch the same list?
No, they're tracked as two separate zones run by the same operator. A listing on one doesn't mean you're automatically on the other. You need to request removal separately for each zone.
Can I speed up an ImproWare removal request?
There's no confirmed way to expedite a request. You're limited to one submission per IP each week. Your best move is confirming the underlying issue is fixed first. That way your first request succeeds instead of getting delayed by a resubmission wait.
Will an ImproWare listing affect all my outgoing mail?
It depends on how many recipient mail servers query ImproWare's zones. Some networks use it as one layer of a broader spam defense. A listing can cause filtering or bounces for a subset of recipients rather than all of them.
