15.7. Storing mail

Mail is stored in different ways depending on the specific situation, as shown in Figure 15-6 on page 429. The mail program uses the following type of mailboxes or folders:

Figure 15-6. Message path for mail

System mailboxThis resides in /var/spool/mail directory and each system mailbox is named by the user ID associated with it. For example, if the user ID is smith, the system mailbox is /var/spool/mail/smith. When the mail arrives for any user ID, it is placed in the respective system mailbox. The shell checks for the new mail and issues the following message when the user logs in: YOU HAVE NEW MAIL
Personal mailboxEach ...

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