I am new to cloudflare. I am trying to set it up. Initially I proxied all my DNS records (including the ones that have to do with email account [A: mail.example.com A: autodiscover.example.com]. When I did so, all my email accounts stopped working in email clients. I have disabled proxy for those email DNS records, and my email accounts are working again. Anyhow, I understand that if the menctioned records are nos proxied, then they are a threat. Should I proxy them or not? If not, is this a risk?