C # obtain the public IP address of China Telecom and send an email

China Telecom's IP address has been refreshed for a while, so I wrote a class to send emails from public IP addresses to my mailbox, Gmail, and 163 can all use javaspclient. QQ does not seem to work, I found it online, saying that QQ's SMTP cannot adapt to unzip pclient public class sendemailhelper {Private Static readonly ilog log = logmanager. getlogger (typeof (sendemailhelper); public static void sendemail () {try {// mailmessage mmsg = new mailmessage (); // mmsg. subject = "Public IP"; // mmsg. from = new mailaddress ("toddzhuang@gmail.com", "Todd Zhuang "); // Mmsg. to. add (New mailaddress ("54733648@qq.com"); // mmsg. isbodyhtml = true; // mmsg. bodyencoding = system. text. encoding. default; // mmsg. body = getwebcontent (@ "http://www.net.cn/static/customercare/yourIP.asp", LB); // smtpclient sclient = new smtpclient (); // sclient. host = "smtp.gmail.com"; // SMTP address of Google // sclient. port = 587; // Google's SMTP port // sclient. enablessl = true; // because Google uses SSL (Secure Socket Layer) encryption links Here, enablessl must be set to true. // Sclient. credentials = new networkcredential ("toddzhuang@gmail.com", "your password"); // sclient. send (mmsg); mailmessage mmsg = new mailmessage (); mmsg. subject = "Public IP"; mmsg. from = new mailaddress ("toddzhuang@163.com"); mmsg. to. add (New mailaddress ("54733648@qq.com"); mmsg. isbodyhtml = true; mmsg. bodyencoding = system. text. encoding. default; mmsg. body = getwebcontent (@ "http://www.net.cn/static/customercare/yourIP.asp"); smtpclient sclient = new smtpclient (); sclient. host = "smtp.163.com"; sclient. credentials = new networkcredential ("toddzhuang@163.com", "your password"); sclient. send (mmsg); log. info ("email sent successfully");} catch (exception e) {log. error (E. message) ;}} Private Static string getwebcontent (string URL) {string strresult = ""; try {httpwebrequest request = (httpwebrequest) webrequest. create (URL); // declare an httpwebrequest request. timeout = 30000; // set the connection timeout request. headers. set ("Pragma", "No-Cache"); httpwebresponse response = (httpwebresponse) request. getresponse (); stream streamreceive = response. getresponsestream (); encoding = encoding. getencoding ("gb2312"); streamreader = new streamreader (streamreceive, encoding); strresult = streamreader. readtoend (); log. info ("successful response to request webpage");} catch (exception e) {log. error (E. message) ;}return strresult ;}}