 .       ,   ; -
    ,     .     -
 MASQUERADE_DOMAIN.

 FEATURE   masquerade_entire_domain   -
  ,    MASQUERADE_DOMAIN.  
    dni   .

    

  Red Hat sendmail       -
,      ( , ,  ). 
       ,   dni 
  :

FEATURE('accept unresolvable domains')dni

   , sendmail    DNS 
,    ;     
  .

  

       ,   
   - .   
       Internet,   -
 .

    :   dni  
    sendmail. me   :

dni FEATURE('relay_based_on_MX')dni

DNS- MX (.  "  DNS"  24) ,  
   .       MX, -
    .     MX  -
      .   -
 ,      .

          -
   .     ,   
  .    relay_based_on_MX  
MX        ,   -
   ,  .    -
  ,    MX    , -
    .

    /etc/mail

  /etc/mail   ,   sendmail.
      : mailertable, access  virtusertable..

640  V.     