Hi, I posted here 2 months ago, saying I wanted to learn UNIX for my work running a small ISP. I had the problem of practically no technical support for our system. Many courses later, I can just about do everything I need to do.
The server is a FreeBSD i386. I can now create email accounts for customers using the adduser command. This creates a user with the email address customer@myisp.com. So this is great, but we also host some domain names. If I could now figure out how to create a customer@hosteddomain.com email account, I'll be all set.

I'm a bit clueless of how this works. I first thought it was based on aliases, but I can't find anything on the mail server that supports this. (the /etc/aliases or etc/mail/aliases file doesn't have anything like this in it.)

So am I on the right path? Or can adduser create these types of accounts as well??

Thanks in advance!