Comment Checking the wrong thing in a not great place? (Score 1) 136
First up lkml.org is a third party site that hosts Linux kernel mailing list archives on a website. Regular Linux kernel mail isn't actually sent from it (I believe that's done by vger) so we're looking up the email reputation for the wrong IP...
Secondly UCEPROTECT is a very aggressive blacklist which states upfront they will block people who they believe are in the vicinity of people who the judge to be sending them spam. It's not the be and end all though and on one server I looked some time ago it's effectiveness was surpassed by other blacklists (here's someone else's old DNS blacklist comparison for 2014). In general I prefer more conservative tools like senderbase when trying to work out an IPs mail reputation.
For what it's worth I've also seen GMail incorrectly mark mails sent to the fio mailing list (which is also managed by vger) as spam and in that case it was purely down to mail being proxied through the list which was a place that didn't match the sender's DMARC records. Most of the time GMail was getting the marking of spam right though (even for mailing list mails)...