zoho mail server blacklisted as spam

I recently got this mail rejection upon sending (see below).

It looks like one of your mail senders is causing a problem for us.

INVALID_ADDRESS, ERROR_CODE :550, ERROR_CODE :rejected because 135.84.80.216 is in a black list at dnsbl-1.uceprotect.net

IP 135.84.80.216 is UCEPROTECT-Level 1 listed. See