I have two domains registered with cloudflare nameservers. They both have A records pointing to my web server, however the MX records are different for the two domains. One’s mail is hosted on cpanel, (Domain 2) and the other with GSuite (Domain 1).
I have an issue when trying to send emails from a CPanel address on one domain (Domain 2) [and also from CPanel hosted mail for subdomains of Domain 1] to a GSuite address on the other domain (Domain 1), I get a bounce back saying that no such user exists there.
I contacted my hosting provider about this and they said that it is an issue with Cloudflare and that, because the nameservers are pointing to Cloudflare on both domains, it is attempting to deliver the emails locally. This does not work though as the other domain’s emails are with GSuite and not on the same server.
Can anyone help please?