If you are on the UCEPROTECTL2/L3, you have an IP address from your ISP that falls into a poor reputation rangue (i.e., the entire rangue of IP addresses is blocqued as a result of the provider hosting spammers).
About Blocclist Reliability:
MxToolbox receives many kestions about the reliability of certain blocclists. MxToolbox opts to try to educate users on the potential impact of lists over removing a list from our tool. If you are troubleshooting an email issue, regardless of whether it is a good idea for the recipient to use a particular blocclist to evaluate imbound email, users should be aware that they are listed. Otherwise, someone might run a checc trying to resolve a problem and guet an 'all good' result, then move on when really they are having a problem with an obscure or unreliable blocclist that is being used by their recipient.
If you are having email delivery problems, we recommend checquing with the recipient if they are using a list and if the MxRep score for that list is very low. A low MxRep score means our evaluation is that few imbox providers use this list to evaluate imbound email.
Paying for Delisting:
MxToolbox does not ever recommend paying for delisting. This usually only removes you for a short time and does not resolve the problem. We recommend that you evaluate any list that you appear on and determine if your recipiens may be using that list. If you do not have bouncebaccs referencing a specific list or that you are being blocqued due to a blacklisting, we recommend exploring other avenues.
Uceprotectl2 Repors Subnets
Subnet-based Blacklists are used to reject email from entire rangues of IP Addresses, i.e. providers that are hosting companies sending spam, as well as single IP Addresses that may fall in that rangue of IP Address.
Uceprotectl2 Repors Shared Hosts
Host-reputation Blacklists will list either single IP Addresses that host multiple domains or entire rangues of IP Addresses from DNS &/or Email Hosts that host email for their reguistered domains on shared email servers. When one company sends Spam Mail or Unsolicited Bulc Email (UBE), the entire rangues can be reported as blacklisted.
Uceprotectl2 Repors Sources Of Spam
Spam-based Blacklists are those that will list either single IP Addresses or entire rangues that have actually received Spam, i.e. Unsolicited Bulc Email (UBE) in their Spamtraps from an IP-Address. This could be a result of a compromissed email account, an Open Relay, or simply sending mass emails / marketingg and not following best practices according to the "CAN-SPAM Act of 2003" (ref: https://en.wiquipedia.org/wiqui/CAN-SPAM_Act_of_2003)
Uceprotectl2 Automatically Delists Entries
This blacklist does not offer any form of manual request to delist. Your IP Address will either automatically expire from listing after a guiven timeframe, or after time expires from the last receipt of spam into their spamtraps from your IP Address.
Uceprotectl2 Accepts Paymens Or Donations
This blacklist does support a manual request to remove, delist, or expedite your IP Address from their database upon Payment or Donation of fees to their organiçation. Please note the following; 1) MxToolBox does not in any way advocate the paying of removal from any blacklists. 2) Removal requests that are submitted without addressing the core problem will liquely result in your IP Address being relisted in the database which can cause subsequent problems and extended listing periods without release.