Find out if your IPv4 or IPv6 address is blocked in major DNSBL and RBL lists
We check the most authoritative and widely used spam databases
If your IP address is listed in spam databases, your emails may not reach recipients or may be automatically marked as spam.
An IP in blacklist may indicate server security issues or compromise.
Checking helps identify security issues, such as open relays or infected devices in the network.
Our service provides detailed information on each listing and instructions for removal from lists.
Detailed instructions for resolving IP address blocking issues
Review the descriptions of the spam lists where your IP is listed. The specific reason is usually indicated:
Take appropriate action based on the reason:
Malware Infection
Scan all network devices with antivirus, update software, and change passwords.
Open Relay
Configure mail server authentication and check its configuration.
For each list where your IP is found:
Some lists automatically remove IPs within 24-72 hours after the issue is resolved; others require manual confirmation.
Timeframes
Most lists process requests within 24-48 hours
Re-Check
Check IP status at least once a day for a week
Answers to the most common questions about spam databases and IP blocking
IP addresses are added to spam databases for several main reasons:
Administrators often don’t suspect an issue until emails start being massively blocked. Regular IP checks help detect problems early.
Check the listing description in each database—usually, the specific blocking reason is indicated (spam, open relay, etc.)
For each database:
• Check for automatic removal (some lists remove IPs automatically within 24-72 hours)
• If manual removal is required—find the form on the database’s website and follow instructions
After requesting removal, continue checking your IP status for 1-2 weeks to ensure the issue is fully resolved.
At least once a week for active servers. Automated checks with notifications are recommended.
Once a month if not used for outgoing email. Daily if issues are detected until fully resolved.
Daily for 7-10 days to confirm the resolution’s stability.
Recommendation:
Set up automated checks with email or Telegram notifications for new listings.
If you’re sure you’re not sending spam, possible reasons include:
A bot or virus on one of your network computers may be sending spam without your knowledge. Scan all devices with antivirus.
If your provider uses dynamic IPs, the previous user of this address might have been a spammer.
Some lists block entire IP ranges due to a single violator. Check your provider’s range.
A misconfigured mail server may be used by spammers without your knowledge.
Start by analyzing your mail server logs for the last 7 days for suspicious activity.
Removal time depends on the list type and its administrators’ policies:
| List Type | Removal Time | Action Required |
|---|---|---|
| Automatic | 12-72 hours | Resolve the issue only |
| Semi-Automatic | 24-96 hours | Removal request |
| Manual | Up to 7 days | Request and admin review |
| Aggressive | 2-4 weeks | Multiple requests, proof of cleanliness |
Important: Even after removal from a list, some email services (like Gmail or Yahoo) may use cached IP information for another 24-48 hours.
Any questions?
Fill out the application form to get a detailed consultation with our specialist. Our specialists are happy to help you with any question!
