Java uses socket to implement SMTP protocol to send mail _java

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Package mail;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import Java.io.OutputStream;
Import Java.io.PrintWriter;
Import Java.io.Reader;
Import Java.net.Socket;
Import java.util.ArrayList;
 
Import java.util.List;
 
Import org.apache.commons.codec.binary.Base64;
    public class Mail {public static void main (string[] args) throws IOException {mail mail = new mail ();
    Mail.setsmtpserver ("smtp.qq.com");
    Mail.setfrommail ("1344364**** @qq. com");
    Mail.addtomail ("105648**** @qq. com");
    Mail.addtomail ("long***** @sina. com");
    Mail.setusername ("134364****");
    Mail.setpassword ("*************");
    Mail.setsubject ("Test Mail"); Mail.setcontent (" 

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