Ruby-talk mail server blacklisted in spamcop

Has anyone else noticed this? Anyone looking into it?

Mar 3 21:19:53 gateway postfix/smtpd[78501]: NOQUEUE: reject: RCPT
from beryllium.ruby-lang.org[210.163.138.100]: 554 Service
unavailable; Client host [210.163.138.100] blocked using
bl.spamcop.net; Blocked - see SpamCop.net - Blocking List ( bl.spamcop.net )?
210.163.138.100; from=[email protected]
to=[email protected] proto=ESMTP helo=<beryllium.ruby-lang.org>

Per the diagnostic, more info here: SpamCop.net - Blocking List ( bl.spamcop.net )?
210.163.138.100

This has caused several interruptions in the past week, leading me to
believe it may have been listed, auto-unlisted, and re-listed at
least once.

Thanks,
Steve