192                               ____________________ Internet

 ,  

  TCP- -, - 
  (    - -
  :  , S   ):

S: +OK  server ready

   -            
(AUTHORIZATION),       -
.         USER 
PASS        (
   ),     
 ,    .  - 
      .

 USER   :

USER name

  "name"  ,   
.        
 -.        -
 "+OK",     PASS    
QUIT   .     "-ERR", 
    USER,   .  -
 :

: USER frated
S: -ERR sorry, no mailbox for frated here



: USER mrose
S: +OK mrose is a real hoopy frood

^)

    ,    , 
 -   .

 PASS       -
 USER:

PASS string

       . -
   PASS, -,    
USER  PASS,       -
.  -  "+OK",  ,   -