1    /ALL

    Copies all of the currently selected messages to the specified
    file. Each message is separated by a form feed.

2    /APPEND

    Adds the selected message to the end of the specified file. If
    the file does not exist, Mail creates it. When you do not specify
    the /APPEND qualifier, Mail creates a new text file.

3    /MAIL

    Specifies that the output file will be a sequential mail
    file with the default file type .MAI and the protection code
    (S:RW,O:RW,G,W). The operating system places the .MAI file
    in your top level mail directory. By default, the protection
    codes of the device and directory match those of your mail file
    directory. Like the /APPEND qualifier, the /MAIL qualifier adds
    the selected message to the end of the specified file.

4    /NOHEADER

    Removes the header information (To:, CC:, From:, and Subj:) from
    the mail message.