If your IP is blacklisted, it can affect how many people can receive emails from your business. Blacklists are used by spam filters to prevent email recipients from receiving unwanted content. Blacklists are databases that track IP addresses and domains. It’s essential to check your email sending IP and domain regularly against blacklists.

How to perform an IP bulk blacklist check

IP bulk blacklist check are maintained by a variety of sources, including spam traps, user submissions, and honeypots. An email sender’s reputation can be significantly affected by a single spam complaint or bounce, and once your IP address is on one of these lists, it can have a severe impact on your ability to deliver messages to your subscribers.

While most people don’t intentionally land on an email blacklist, sometimes the previous owner of an IP address has been engaging in spammy practices or sending malware to innocent users. This can negatively impact the deliverability of your emails and make it difficult for you to get removed from the list.

How to remove an IP address from the UCEPROTECTL2/L3 blacklist

The UCEPROTECTL3/L3 Blacklist is a public list that catalogs individual IP addresses or subnets associated with multiple businesses engaged in unsolicited bulk email (UBE) activity. In addition to the main list, it also monitors several subnet blacklists and has an API service.

The best way to remove an IP from a blacklist is to contact the list administrator and submit a removal request. Make sure to follow their guidelines and instructions precisely to increase the chances of your removal request being considered.