UCEPROTECTL3 blacklist - what is this listing

An IP from the UCEPROTECTL3 list cannot be removed manually.
It is deleted automatically after 7 days from the last day of mailing. You can speed up this process only with a donation. They extort money.
For real spam filtering in the world, only a few SPAM databases are used: spamhaus, sorbs, spamcop, abuseat, barracude, the rest are blurring of the eyes.
It's safe to say that UCEPROTECTL lists do not affect server mail deliverability.