I have setup a Mail server using a Maildir format. Of course, you'll just input the Account Name,Password and the outgoing and incoming server in your Email client. How can I append a domain in my Account name? Lets say my Account Name is nelson. I want to change things. How can I append a domain in every Account Name in my Mail server? Instead of typing nelson, I'll be putting nelson@linux.com or nelson@Linux.

How could I do this by using the email address nelson@linux.com and using in the Account Name is nelson@linux or nelson@linux.com in my Email Client?

Is this possible?