小编wad*_*ars的帖子

错误:

com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. a5sm29349940pbw.4 - gsmtp

at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1829)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1368)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:886)
at javax.mail.Transport.send0(Transport.java:191)
at javax.mail.Transport.send(Transport.java:120)
at com.conceptbuild.EmailGenerator.main(EmailGenerator.java:120)

码:

package com.conceptbuild;

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

public class EmailGenerator {

    public EmailGenerator() {
        // TODO Auto-generated constructor stub
    }

    private class MailAuthenticator extends Authenticator {

        String username = "username";

        String …