Interserver Blacklist: What Is It and How To Remove Yourself From It?

The Warmup Inbox Team
The Warmup Inbox Team

What Is The Interserver Blacklist?

The Interserver Blacklist is a DNS-based Blacklist that lists single IP Addresses or entire ranges.  Those who land on the Interserver Blacklist are guilty of sending unsolicited bulk emails that got caught in their spam traps.  The Blacklist blocks IP Addresses automatically and does not take reports from other parties. The Interserver Blacklist is currently tracking over 1.7 million cases of possible malware.          

How Can I Remove Myself From The Interserver Blacklist?

The Interserver Blacklist automatically deletes entries after a certain period of time has passed.  Keep in mind, there cannot be another flag of spam coming from the IP Address or range during that time.  There is not an option to manually request to be taken off.  There is an option to search your IP Address in their database and an option to search domains - those options can be found here.

How do I reduce my risk of getting onto the Interserver Blacklist?

The best way to avoid getting listed on a blacklist is to engage in proper email practices such as...

  • Verify all email addresses before attempting outreach
  • Avoid sending unnecessary emails
  • Avoid the use of spam words within your email drafts
  • Keep your sending volume to a minimum (30-50 a day if your inbox has been warmed up with us for at least 30 days)

IP: An Internet Protocol address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. An IP address serves two main functions: host or network interface identification and location addressing.


Domain Name System Blacklists: (DNSBL’s for short) spam lists that allow website administrators to restrict messages from systems who are known to send spam.

Blacklist