 4.     SMTP, , 14_______________199

    ,    -
     .     
   .

     ,    BAD
    .    -
       .   
 , ,    
     NO   
.

   IMAP  ,  
       "-",   -
   ""  .     
 ,     , ,   -
          .
        
     .       
  ,        -
,    .

    ,       -
  ,          
      ,   
  .

       
  ,   IMAP  
 .

   IMAP

        IMAP  -
 ,        -
.   UID   32- ,
     .  ,
  ,     UID-,
    .   
       , ,  -
   .

        -
 (UIDVALIDITY).   UID-    64-
 ,   .  UID-
 ,  UIDVALIDITY     
  ,    .

  ,    IMAP  -
 , . .       -