javamail 发送邮件时 No authentication mechansims supported by both server and client

Posted 2020-08-15

项目需求要更换发邮件服务器，变更成中转邮箱服务器发邮件。结果总是报 No authentication mechansims supported by both server and client 。 

搜了一堆东东，都不靠谱最后自己不断调试成功搞定。借鉴网址如下：

http://stackoverflow.com/questions/8615730/javamail-with-ms-exchange-no-authentication-mechansims-supported-by-both-server

原因：中转服务器不需要验证用户名密码啥的，所以链接的时候 

MAIL_SMTP_AUTH 要设为 false。

transport.connect();//中转服务器邮箱不验证  连接的时候不要传东西，哪怕是 null 或 空 。它会认为你要验证。

（首先保证自己的发邮件服务器和应用服务器想通的。并且邮件服务器端口正确，默认是25（telnet 192.168.1.114 25））

javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
        at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:765)
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685)
        at javax.mail.Service.connect(Service.java:274)
        at javax.mail.Service.connect(Service.java:91)
        at com.zhaopin.common.mail.util.MailSendUtil.<clinit>(MailSendUtil.java:108)
        at com.zhaopin.cdcpm.thread.MailThread.run(MailThread.java:17)
=================begin send mail=======================
15:06:31,232 ERROR [com.zhaopin.common.mail.util.MailSendUtil] (com.zhaopin.common.mail.util.MailSendUtil:155) - When sending mail, here catch exception!!!!! 
javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
        at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:765)
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685)
        at javax.mail.Service.connect(Service.java:274)
        at javax.mail.Service.connect(Service.java:91)
        at com.zhaopin.common.mail.util.MailSendUtil.send(MailSendUtil.java:135)
        at com.zhaopin.cdcpm.thread.MailThread.run(MailThread.java:17)
javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
        at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:765)
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685)
        at javax.mail.Service.connect(Service.java:274)
        at javax.mail.Service.connect(Service.java:91)
        at com.zhaopin.common.mail.util.MailSendUtil.send(MailSendUtil.java:135)
        at com.zhaopin.cdcpm.thread.MailThread.run(MailThread.java:17)

　　

static {
		log.info("----- start init mail environment -----");
		Authenticator auth = new Authenticator() {
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication(MailConfig.getMailFromUserName(), MailConfig.getMailFromUserPswd());
			}
		};
	
		Properties props = new Properties();
	
		// 设置发送邮件的邮件服务器的属性
		props.put(MAIL_SMTP_HOST, MailConfig.getMailHost());
	
		// 需要经过授权，也就是有户名和密码的校验，这样才能通过验证（一定要有这一条）
		props.put(MAIL_SMTP_AUTH, MailConfig.isValidate());
	
		// 用刚刚设置好的props对象构建一个session
//		session = Session.getDefaultInstance(props, auth);
		session = Session.getDefaultInstance(props, null);//中转服务器邮箱不验证
	
		try {
			// 发送邮件
			transport = session.getTransport("smtp");
			// 连接服务器的邮箱
//			transport.connect(MailConfig.getMailHost(), MailConfig.getMailFromUserName(), MailConfig.getMailFromUserPswd());
			transport.connect();//中转服务器邮箱不验证
			log.info("----- Connect with " + MailConfig.getMailHost() + " successfully -----");
		} catch (Exception e) {
			log.error("----- Connect with " + MailConfig.getMailHost() + " failed -----", e);
		}
	}