 4.     SMTP, , 14_______________197

     PASS secret

S     +OK mrose's maildrop has 2 messages (320 octets)

     STAT

S     +OK 2 320

     LIST

S     +OK 2 messages (320 octets)

S     1 120

S     2 200

S

     RETR 1

S     +OK 120 octets

S     <the POP3 server sends message 1>

3

     DELE 1

S     +OK message 1 deleted

     RETR 2

S     +OK 200 octets

S     <the POP3 server sends message 2>

S

     DELE 2

S     +OK message 2 deleted

     QUIT

S     +OK dewey POP3 server signing off (maildrop empty)

   <close connection>

S   <wait for next connection>

  POP,      ,
       
   .     
        IMAP.

        : RFC-1081,
RFC-1082, RFC-1225, RFC-1725, RFC-1939.

14

        
 IMAP  IMAP4.

 IMAP4 (Internet Message Access Protocol, Version 4,  -
    Internet,  4)   
       .