Why can't I receive email for a domain proxied through Cloudflare?

Question

Why can't I receive email for a domain proxied through Cloudflare?

Answer

By default, Cloudflare doesn't proxy email traffic. MX records should point to a hostname that is not proxied through Cloudflare and resolves directly to the server.

For more information on Cloudflare and email issues, please see the following:

Cloudflare | Email issues