The user account should have an incoming email "folder" with useradd, or, at least it used to with RH. I'm not sure what you mean by email account.
If you look in /var/spool/mail you'll see all the inbound email user spool files. All users should have a file ('account') there if they are created with useradd <username>
Now, what you do with that file is a different story
You might try installing a text email client, like Pine, or Elm, and see if it can see that same email box.