foldername
    Specifies the name of the folder from which to select messages.
    If you omit the foldername, the folder to be used is determined
    in the following order:
    1. The current folder is used, if any (unless the /NEW qualifier
       is specified)
    2. The NEWMAIL folder is used if:
       o  You specify the /NEW qualifier
       o  You omit selection qualifiers and you have new mail
    3. The MAIL folder is used.