If you want IMail Server to receive mail for a second mail domain with its own users, you need to set up a virtual mail domain for the second domain. For example, if your mail server provides mail service for domain1.com, and you also want it to provide mail service for domain2.com, you can create a virtual mail domain for domain2.com.
There are two types of virtual mail domains:
Note: Whether you use a virtual mail domain with an IP address or without an IP address, you must make DNS entries for your domain(s).