It sounds like some delivery problem(s) may have caused your email address to end up on a suppression list.
Can you please confirm that we’re talking about the exact same email address, which is not working for the account verification, but appears to be working perfectly fine, when we’re talking about emails from the Cloudflare Community?
It may be, I don’t see bounced emails, but I took steps to remove your email from our suppression lists as a just in case. If you continue to not receive the emails, let us know here and check with Yahoo to see if they can see a reason for the delays. Sorry for the issues.