efaq: Automatically starting a mail or news reader

 
 11.7 How do I make Emacs automatically start my mail/news reader?
 =================================================================
 
 To start Emacs in Gnus:
 
      emacs -f gnus
 
 in Rmail:
 
      emacs -f rmail
 
    A more convenient way to start with Gnus:
 
      alias gnus 'emacs -f gnus'
      gnus
 
    It is probably unwise to automatically start your mail or news reader
 from your ‘.emacs’ file.  This would cause problems if you needed to run
 two copies of Emacs at the same time.  Also, this would make it
 difficult for you to start Emacs quickly when you needed to.