Receiving Mail

  Choose Receive Mail from the File menu to add new
  messages to your INBOX folder and update the list of new
  messages.

  If you choose this menu item while reading a message in the

  INBOX, Mail will close the Read window before delivering
  your mail.  If you are reading a message in the INBOX in a
  Read window other than the default Read window, you will
  not be able to receive your messages.

  You cannot receive new mail if you are replying to a message
  in the INBOX.

  Additional topics:

  *   Using Multiple and Default Read Windows