Question

我正在使用sendMail进行Servlet JavaMail。我的输出有javax.mail.AuthenticationFailedException。有人可以帮帮我吗？感谢。

sendMailServlet代码：

try {
        String host = "smtp.gmail.com";
        String from = "my@gmail.com";
        String pass = "pass";
        Properties props = System.getProperties();
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");
        props.put("mail.debug", "true");

        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        Address fromAddress = new InternetAddress(from);
        Address toAddress = new InternetAddress("test1@gmail.com");

        message.setFrom(fromAddress);
        message.setRecipient(Message.RecipientType.TO, toAddress);

        message.setSubject("Testing JavaMail");
        message.setText("Welcome to JavaMail");
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        message.saveChanges();
        Transport.send(message);
        transport.close();

    }catch(Exception ex){

        out.println("<html><head></head><body>");
        out.println("ERROR: " + ex);
        out.println("</body></html>");
    }

GlassFish 2.1上的输出：

DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 587, isSSL false
220 mx.google.com ESMTP 36sm10907668yxh.13
DEBUG SMTP: connected to host "smtp.gmail.com", port: 587
EHLO platform-4cfaca
250-mx.google.com at your service, [203.126.159.130]
250-SIZE 35651584
250-8BITMIME
250-STARTTLS
250-ENHANCEDSTATUSCODES
250 PIPELINING
DEBUG SMTP: Found extension "SIZE", arg "35651584"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
STARTTLS
220 2.0.0 Ready to start TLS
EHLO platform-4cfaca
250-mx.google.com at your service, [203.126.159.130]
250-SIZE 35651584
250-8BITMIME
250-AUTH LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250 PIPELINING
DEBUG SMTP: Found extension "SIZE", arg "35651584"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
aWpveWNlbGVvbmdAZ21haWwuY29t
334 UGFzc3dvcmQ6
MTIzNDU2Nzhf
235 2.7.0 Accepted
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true

Answer 1

您需要实施自定义Authenticator

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;


class GMailAuthenticator extends Authenticator {
     String user;
     String pw;
     public GMailAuthenticator (String username, String password)
     {
        super();
        this.user = username;
        this.pw = password;
     }
    public PasswordAuthentication getPasswordAuthentication()
    {
       return new PasswordAuthentication(user, pw);
    }
}

现在在Session

中使用它

Session session = Session.getInstance(props, new GMailAuthenticator(username, password));

另请查看JavaMail FAQ

Answer 2

Hello Everyone此错误来自Google安全... 这可以通过降低安全性来解决。

转到此链接：＆＃34; https://www.google.com/settings/security/lesssecureapps＆＃34;并使＃34;开启＆＃34;然后你的应用程序运行肯定。

Answer 3

我在下面一行

中遗漏了这个验证者对象参数

Session session = Session.getInstance(props, new GMailAuthenticator(username, password));

此行解决了我的问题，现在我可以通过我的Java应用程序发送邮件了。其余代码很简单，如上所述。

Answer 4

问题是，您正在创建一个transport对象并使用它的connect方法对自己进行身份验证。但是，然后使用static方法发送忽略对象完成的身份验证的消息。

因此，您应该在对象上使用sendMessage(message, message.getAllRecipients())方法，或者使用其他人建议的身份验证器来获取授权通过会议。

这是Java Mail FAQ，您需要阅读。

Answer 5

只想与您分享：
更改数字海洋机器（IP地址）后，我碰巧遇到此错误。显然，Gmail认为这是一次黑客攻击。遵循他们的指示并批准新的IP地址后，代码又恢复运行。

Answer 6

当您尝试从新设备或应用程序登录Google帐户时，必须解锁验证码。要解锁验证码，请转到https://www.google.com/accounts/DisplayUnlockCaptcha 然后

还要确保allow less secure apps on

如何解决javax.mail.AuthenticationFailedException问题？

6 个答案: