mailertable:       

 ,     ,   -
,   .     sendmail   /etc/mail/mailertable.
    mailertable       -
,   .  sendmail   -
   ,     , -
    .   Red Hat     :

        mailertable  
sendmail.

    mailertable  ,  
 tcorp. corn,    bravo. corn:

$ cat /etc/mail/mailertable

tcorp.corn smtp:[bravo.corn]

      sendmail    MX,
     SMTP.     -
  .

          
,   . , .tcorp. corn  -
 sales. tcorp. corn, mktg. tcrop. corn   .

  sendmail    mailertable. db  
mailertable        sendmail.

access:   

       ,    -
       . ,  
   ,    (relay host). ,  -
    ,    /etc/mail/access.
   Red Hat      :

$ cat /etc/mail/access

# by default we allow relaying from localhost...

(     localhost)
localhost.localdomain           RELAY
localhost                       RELAY
127.0.0.1            ,   '      RELAY

    access   ,      IP-
,        RELAY.  
   ,      ,
 192.168.:

192.168.                       RELAY

  sendmail    access, db   access 
      sendmail.

 20. sendmail:   ,     641