Not sure if I did something to get this or if it part of mailcow.
I see this in my postfix log every once in a while.
postfix-mailcow-1 | May 29 06:41:12 93b177298c8c postfix/dnsblog[28306]: warning: dnsblog_query: lookup error for DNS query 69.95.59.146.hostkarma.junkemailfilter.com: Host or domain name not found. Name service error for name=69.95.59.146.hostkarma.junkemailfilter.com type=A: Host not found, try again