Does Cloudflare support having MX records other than Cloudflare in addition to the Cloudflare email routing records or does Cloudflare Email Routing take the place of all MX records on the domain.
For example we have many clients with domains where they have full mail services under their domain but it would be highly convenient to add (or even in a rare case override e-mail addresses) without the need to add them to their full e-mail service. But it would not work to have Cloudflare be the only MX. Cloudflare would have to be smart enough to be the proxy for all MX traffic and then route on those messages that are not routable directly by it. If it is this smart it would be very cool.