Hello,

I have a single server with one Public IP and 10 domains. For each domain I’d like to have a separate docker container as an email server (Postfix + Dovecot). I’d like to achieve this with transparent TCP proxy with SNI support.

I'd like to route traffic from example.com on ports 587 & 143 to one container and traffic for acme.com on ports 587 & 143 to a different container, etc.

Should ports 587 & 143 be changed to 465 & 993 instead to achieve this?

Can I achieve this by using host:port? Does anyone know of an example?

Thank you.