Rainloop for separately domain


It’s possible to create separately rainloop domain with SSL cert for adress?
Now it’s correct SSL for one domain.

Or maybe I can change/delete 8090 port for rainloop?

Solution is one, install selected webmail in subdomain or directory like /mail, /webmail or mail.domain.com or also webmail.domain.com.

Rainloop at subdomain work great.

can you give me step by step instruction?