The following table shows the contents of the /usr/lib directory, which is used for mail services.
Table 14–10 Contents of the /usr/lib Directory| 
 Name  | 
 Type  | 
 Description  | 
|---|---|---|
| 
 mail.local  | 
 File  | 
 Mailer that delivers mail to mailboxes.  | 
| 
 sendmail  | 
 File  | 
 Routing program, also known as the mail transfer agent.  | 
| 
 smrsh  | 
 File  | 
 Shell program (sendmail restricted shell) that uses the “|program” syntax of sendmail to restrict programs that sendmail can run to those programs listed in the /var/adm/sm.bin directory. Refer to the smrsh(1M) man page for recommendations about what to include in /var/adm/sm.bin. To enable, include this m4 command, FEATURE(`smrsh'), in your mc file.  | 
| 
 | 
 symbolic link  | 
 A symbolic link points to the/etc/mail/cf directory. For more information, refer to Contents of the /etc/mail/cf Directory.  |