Is it possible to have multiple Mailcow servers, each one hosting some domains but link them so that everybody can access their mail under the same adress.
Example, server1 is located at server1.example.com and hosts mails for client1.com and client2.com; server2 is located at server2.example.com and hosts mails for client3.com and client4.com. We would like to have every client be able to access their mails at mail.example.com and use that address when they setup their devices.
The reason to that is that, in my company, we host our clients mails on a mailcow instance and more and more are asking to get their inbox increased. Problem is that we’re reaching the limit of storage we can put on this machine, we need to have a second one. However we would prefer to not have to reconfigure our clients devices (or ask them to do so).
We thought of using a proxy like Nginx but it’s not easy to setup and it still leaves some problems like accessing the webmail/mailcow ui.