 , sendmail      ,  -
 ISP   .    sendmail  -
  SMTP- ,  .   -
 ISP,    .

 sendmail        -
 ,   DNS- MX   (.  "MX" 
"  DNS"  24).     ( MUA) 
   sendmail   .   
  POP  IMAP,    
,           -
  .      ,    -
   ,      POP  IMAP
(.  "  IMAP  "    ).

 

  :

 sendmail ()

 sendmail-cf (   sendmail)

 squirrelmail (,   Web-, . 
" Web-"    )

 spamassassin (,   , . 
"SpamAssassin"    )

 mailman (,     , .
 " "    )

 imap (,      IMAP  POP)
     chkconfig   sendmail  
    (  sendmail    -
 ):

 /sbin/chkconfig sendmail on

 sendmail.  sendmail    , 
 ,       . -
   ,   sendmail  ;   
     sendmail:

 /sbin/service sendmail restart

Shutting down sendmail:  ( sendmail)                     [ OK ]
Shutting down sm-client: ( sm-client)                    [ OK ]
Starting sendmail:       ( sendmailj                        [ OK ]
Starting sm-client:      ( sm-client)                       [ OK ]

   chkconfig   spamassassin (spamd)  
      (  
spamassassin  ):

 /sbin/chkconfig spamassassin on

 20. sendmail:   ,     631