发送office365邮件有的时候失败

Question

如题，用下面的代码发邮件有的时候成功，有的时候失败，，，求解答。。

import java.util.Date;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MailService {

	static int port = 587;   //smtp端口
	static String server = "smtp.office365.com";   //smtp服务器地址
	
	static String from = "xxx";   //发送者
	static String user = "xxx";    //发送者地址
	static String password = "ppp";   //密码

	public static void sendEmail(String email, String subject, String body) {
		try {
			Properties props = new Properties();
			props.put("mail.smtp.host", server);
			props.put("mail.smtp.port", String.valueOf(port));
			props.put("mail.smtp.auth", "true");
			props.put("mail.smtp.starttls.enable", "true");
			Transport transport = null;
			Session session = Session.getDefaultInstance(props, null);
			transport = session.getTransport("smtp");
			transport.connect(server, user, password);
			MimeMessage msg = new MimeMessage(session);
			msg.setSentDate(new Date());
			InternetAddress fromAddress = new InternetAddress(from);
			msg.setFrom(fromAddress);
			InternetAddress[] toAddress = new InternetAddress[1];
			toAddress[0] = new InternetAddress(email);
			msg.setRecipients(Message.RecipientType.TO, toAddress);
			msg.setSubject(subject, "UTF-8");	
			msg.setText(body, "UTF-8");
			msg.saveChanges();
			transport.sendMessage(msg, msg.getAllRecipients());
			System.out.println("successful");
		} catch (NoSuchProviderException e) {
			e.printStackTrace();
		} catch (MessagingException e) {
			e.printStackTrace();
		}
	}
	
	

	
}

失败时报这个
javax.mail.MessagingException: Could not connect to SMTP host: smtp.office365.com, port: 587;

Answer 1

重连啊, 还能怎么办?

Answer 2

回复
@zp-wmhx : 这样不太好，时间太久了。

Answer 3

引用来自“zp-wmhx”的评论

这错误看不懂?  

Answer 4

这错误看不懂?