I need help in determining if this use case is possible:
We have one primary mail server where we want certain email addresses to be stored from domainA.com
All of the rest of the email addresses not defined on primary mail server, we want to be forwarded to a secondary server using secondary MX records (for same domainA.com)
Example: we have a domain which has several business email addresses (employees, sales, support, etc.) but on same domain we also have thousands of 'virtual' emails that we parse for our application. (we don't care about POP3 access etc. for the virtual addresses).
There is a service we are trying to use that can do all of the email parsing for us, but requires us to point our MX records to their server.
We want to be able to control our business emails on our own server, and only send the virtual emails to them.
Any suggestions, on how we can achieve this?