高效的Esmtp,带验证，用Socket编写

{

try

{

if(Send_Method=="1")

{

smtpServerName = ConfigurationSettings.AppSettings["smtpServerName"];

smtpServerPort = Convert.ToInt32(ConfigurationSettings.AppSettings["smtpServerPort"]);

userName = ConfigurationSettings.AppSettings["userName"];

password = ConfigurationSettings.AppSettings["password"];

//from = ConfigurationSettings.AppSettings["from"];

//fromName = ConfigurationSettings.AppSettings["fromName"];

charset = ConfigurationSettings.AppSettings["charset"];

}

else

{

smtpServerName ="";//your smtp server

smtpServerPort =25;

userName ="";//your name

password ="";//your pass

charset ="GB2312";

//from = ConfigurationSettings.AppSettings["from"];

//fromName = ConfigurationSettings.AppSettings["fromName"];

}