Articles on: Solutions

Delisting

THREATINT DNSBL is a database of IP addresses from which we recommend not to accept email. IP Addresses listed are known to conduct malicious activities including but not limited to sending spam and scanning hosts. Mail server operators may query our list before deciding to accept email from your mail server.

If you find your mail server listed on our DNSBL, please follow these steps to get delisted:
Make sure that you are are actually testing the IP address of your mail server, not some random address. Please see Private networks and Link-local addresses
Make sure that all malicious activities have stopped! If you haven't eliminated the root cause of the problem (e.g. removed the last compromised PC from your network which unfortunately used the same IP address as your mail server), the problem will not go away.
Your IP address will be automatically removed from our DNSBL ("delisted") within 48 hrs after all malicious activity has ceased.

Kindly remember: delisting is only going to happen if you have eliminated the root case of the problem! If you haven't, you are going to be listed indefinitely or find yourself in a repeating cycle of being listed, delisted, and relisted again.

We recommend multirbl.valli.org/lookup to test the IP address of your mail server against a large number of DNSBL.

Updated on: 18/09/2024

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