Use SMTP to send emails

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 1   System. net. Mail. smtpclient Client  =     New  System. net. Mail. smtpclient ();
  2   Client. Host  =     "  Smtp.qq.com  "  ;
  3  Client. usedefacrecredentials  =     False  ;
  4   Client. Credentials  =     New  System. net. networkcredential (  "  Email user name  "  ,  "  Email Password "  );
  5   Client. deliverymethod  =  System. net. Mail. smtpdeliverymethod. Network;
  6   System. net. Mail. mailmessage message  =     New  System. net. Mail. mailmessage (  "  Sender's email address  "  , "  Recipient's email address  "  );
  7   Message. Subject  =     "  Penalty Decision on xx  "  ;
  8   Message. Body  =     " <Center> penalty decision on XX </center> <br/> penalty decision on XX: Penalty Decision on xx  "  ;
  9   Message. bodyencoding  =  Encoding. utf8;
  10   Message. isbodyhtml  =     True  ;
  11   System. net. Mail. Attachment m; //  Attachment  
  12       If  (  This  . Fileupload1.hasfile)
  13   {
  14   M  =     New System. net. Mail. Attachment (  This  . Fileupload1.postedfile. filename );
  15   Message. attachments. Add (m );
  16   }
  17   Client. Send (Message );