We've only scratched the surface of the ways you can use electronic mail. For more detailed information on the MAIL, MAILBOOK, and NAMES commands, you can use the CMS HELP command.
In particular, there are quite a number of options which you can set to make the MAIL and MAILBOOK commands behave the way you want them to. To change these options, select Options from the menu bar, and work your way through the menus until you get an action window describing one of the sets of options you can change. Change an option as you wish, then choose either Apply or Save. Choosing Apply will make only a temporary change to these options, which will last until you exit Mail or Mailbook. Choosing Save will make a permanent change to these options. In either case, the change will take effect immediately. While the MAIL and MAILBOOK commands use a common options set, you can set different options for each command. However, if you change the MAIL options set and have never changed the MAILBOOK options set, the MAIL options set will be used for MAILBOOK as well. If you need help customizing your MAIL environment, consult your Help Desk.
In addition to the Options menu, experienced CMS users can write a REXX macro named MAILUSER XEDIT which will be called at certain times to manage options settings. For details on this macro, see the MAIL PROFILE help file.
A signature file can be used to append a standard "signature" to every mail message. This is normally a file named userid SIGNATUR, and can contain any text that you wish. Once this file is created, set the option to automatically sign your messages, and the contents of the file will automatically be appended to every mail message that you send.