Additional Directories and Files Used for Mail Services

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The following list describes the directories and files associated with mail services that have not previously been discussed:

/etc/default/sendmail: File lists the environment variables for the startup script for sendmail.
/etc/shells: File lists the valid login shells.
/etc/mail/cf/sh: Directory contains shell scripts that are used by the m4 build process and migration aids.
/system/volatile/sendmail.pid: File lists the PID of the listening daemon.
/usr/sbin/check-permissions: File checks the permissions of the :include: aliases, .forward files, and their parent directory path for correct permissions.
/usr/sbin/check-hostname: File verifies that sendmail is able to determine the fully qualified host name.
/usr/sbin/editmap: File queries and edits single records in database maps for sendmail.
/usr/sbin/in.comsat: Mail notification daemon.
/usr/sbin/makemap: File builds binary forms of keyed maps.
/usr/sbin/newaliases: Symbolic link points to /usr/lib/sendmail. Used to create the binary form of the alias database. Previously in /usr/bin.
/usr/sbin/syslogd: Error message logger used by sendmail.
/usr/sbin/etrn: Perl script that starts the client-side remote mail queue.
/var/mail/mailbox1
/var/mail/mailbox2: Mailboxes for delivered mail.
/var/spool/clientmqueue: Storage directory for mail that is delivered by the client daemon.
/var/spool/mqueue: Storage directory for mail that is delivered by the master daemon.