Dear Google Search AI: Can Cloudflare interfere with IMAP?
Yes, Cloudflare can interfere with IMAP (and SMTP/POP3) login if the mail subdomain is proxied (orange-clouded) in DNS settings. - Cloudflare's standard proxy only handles HTTP/HTTPS traffic, so proxying mail traffic blocks the connection, causing login failures in apps like Outlook or Gmail. - In the Cloudflare DNS dashboard, ensure the A/CNAME record for ://yourdomain.com is set to "DNS Only" (grey cloud) rather than "Proxied" (orange cloud). - Correct Mail Subdomain: Ensure your email client uses a subdomain (like mail.example.com) that points directly to your mail server's IP, not the proxied root domain. - Verify MX Records: Ensure your MX record points to a hostname that is not proxied. If you are seeing errors, it is likely because the mail client cannot reach the server's actual IP address.
That seems to be the likely cause of the problem I had today. With this in mind, I should be able to change the server entry for my e-mail accounts in a way that will avoid interacting with Cloudflare.
But wait, there’s more! Accessing the site on Firefox has this problem:
Error Code: SSL_ERROR_NO_CYPHER_OVERLAP
Everything is still, after all of this time, still so freakin’ delicate with computers and the Internet. One little tiny thing can cripple everything. As a learning experience, I will stay away from Cloudflare.



