ERROR at line 1:
ORA-29278: SMTP transient error: 454 5.7.3 Client does not have permission to
submit mail to this server.
ORA-06512: at "SYS.UTL_SMTP", line 17
ORA-06512: at "SYS.UTL_SMTP", line 96
ORA-06512: at "SYS.UTL_SMTP", line 221
ORA-06512: at line 19

Declare
  SendorAddress  Varchar2(200)  := 'sender@myServer.com';
  ReceiverAddress varchar2(200) := 'receiver@myServer.com';
  EmailServer     varchar2(200) := 'smtp.myServer.com';
  Port number  := 25;
  conn UTL_SMTP.CONNECTION;
  crlf VARCHAR2( 2 ):= CHR( 13 ) || CHR( 10 );
  mesg VARCHAR2( 4000 );
  mesg_body varchar2(4000);

 

BEGIN
  conn:= utl_smtp.open_connection( EmailServer, Port );
  utl_smtp.helo( conn, EmailServer );
  utl_smtp.mail( conn, SendorAddress);
  utl_smtp.rcpt( conn, ReceiverAddress );
  mesg:=
        'Date: '||TO_CHAR( SYSDATE, 'dd Mon yy hh24:mi:ss' )|| crlf ||
         'From:'||SendorAddress|| crlf ||
         'Subject: Mail Through ORACLE Database' || crlf ||
         'To: '||ReceiverAddress || crlf ||
         '' || crlf ||
         ' This is Mail from Oracle Database By Using UTL_SMTP Package';

  utl_smtp.data( conn, mesg );
  utl_smtp.quit( conn );

END;
/