Thank you for all your help Scott but I still do not seem to find the necessary information needed to configure my email
All FTP (including Shell) users can also receive email, and so in a way they are also "mail users".
However, there are also special Mail-only users (also known as mailboxes) that are only used for reading and sending email, and cannot FTP nor access the shell. These mailboxes currently are all named in the format m######## although they can also be accessed using the entire associated primary email address. Each mailbox has one primary email address associated with it, but can also have unlimited other email addresses that also deliver to it (you can set this up from the Mail > Addresses area of the DreamHost control panel).
Note that it is possible that if a domain is removed, any m####### mailboxes associated with it might remain on the server. It is not possible to see such mailboxes in the control panel, only from the command-line.
This is what I am looking for .. although I have looked in the Mail---> Manage mail ----> and see my email account .. the only other options I have is edit, disable, and delete. I do not see the "M" format nor know how to get to it .. I need this 'M" format to set up my outlook email..
Again .. please help