Creating a Local Mail Alias (/etc/mail/aliases)
In a network environment, you probably have a central way to administer mail aliases. In addition, users frequently want to set up local aliases for use from their systems. Use the following steps to create mail aliases on a local system.
Edit the /etc/mail/aliases file.
At the end of the file, under the Local Aliases category, type aliasname:username1,username2,... and press Return after the last username.
Save the changes.
For example, if you want to create an alias called friends, edit the /etc/mail/aliases file and add an entry like the following.