You will need to send an email to the
googlegroups.com mail alias to help prove you are a human, and not a robot, or a spammer. To help expedite this, please at a minimum, provide in the email the userid you providedtried to register with, as well as the version of Jenkins you currently are running. This will help us quickly prove you are not a spammer.
We're a popular target of human spammers, i.e. actual people with actual web browsers trying to post their spam in JIRA and the wiki. Try to make your email look legitimate and not like it's written by someone who doesn't know anything or just read the jenkins.io home page.