 4.     SMTP. , 14______________201

1.   ,      
   .

2.  ,       
  .

3.     ,     -
   .

4.  ,      
.

   ,  "S:"    -
   IMAP4,   ":"     .

  LOGIN.       (-
, TCP),   ,     
,     .  
    LOGIN.   
     :

S:   * OK IMAP4revl Service Ready

:   aOOl login ali sesam
S:   aOOl OK LOGIN completed

 LOGIN       
  .     
 ,     AUTHENTICATE. -
   ,   -
,     .  -
       
   . ,   
 KERBEROS,    :

S: * OK KerberosV4 IMAP4revl Server

: AOOl AUTHENTICATE KERBEROS_V4

S: + AmFYig==

: BAcAQU5EUkvXLkNNVS5FRFUAOCAsho84kLN3/IJrrirMG+25a4DT

+nZImJjnTNHJUtxAA+oOKPKfHEcAFs9a3CL50ebe/ydHJUwYFd

WwuQlMWiy6IesKvjL5rL9WjXUb9MwT9bpObYLGOKilQh
S: + or//EoAADZI=
C: DiAF5A4gA+oOIALuBkAAmw==
S: AOOl OK Kerberos V4 authentication successful

         ()
,     .   -
  SELECT.     
: