javax.mail.AuthenticationFailedException：连接失败，没有指定密码？
Posted
技术标签:
【中文标题】javax.mail.AuthenticationFailedException：连接失败，没有指定密码？【英文标题】：javax.mail.AuthenticationFailedException: failed to connect, no password specified? 【发布时间】：2011-09-30 10:25:25 【问题描述】：此程序尝试发送电子邮件但抛出运行时异常：
javax.mail.AuthenticationFailedException: failed to connect, no password specified?
当我提供了正确的用户名和密码进行身份验证时，为什么会出现此异常？
发件人和收件人都有 g-mail 帐户。发件人和收件人都有 g-mail 帐户。发件人已禁用两步验证过程。
这是代码：
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
class tester
public static void main(String args[])
Properties props = new Properties();
props.put("mail.smtp.host" , "smtp.gmail.com");
props.put("mail.stmp.user" , "username");
//To use TLS
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.password", "password");
//To use SSL
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
Session session = Session.getDefaultInstance( props , null);
String to = "me@gmail.com";
String from = "from@gmail.com";
String subject = "Testing...";
Message msg = new MimeMessage(session);
try
msg.setFrom(new InternetAddress(from));
msg.setRecipient(Message.RecipientType.TO,
new InternetAddress(to));
msg.setSubject(subject);
msg.setText("Working fine..!");
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com" , 465 , "username", "password");
transport.send(msg);
System.out.println("fine!!");
catch(Exception exc)
System.out.println(exc);
即使在输入密码后，我也得到了异常。为什么不认证？
【问题讨论】：
【参考方案1】：尝试创建一个 javax.mail.Authenticator 对象，并将其与属性对象一起发送到 Session 对象。
Authenticator 编辑：
您可以修改它以接受用户名和密码，并且可以将它们存储在那里或任何您想要的地方。
public class SmtpAuthenticator extends Authenticator
public SmtpAuthenticator()
super();
@Override
public PasswordAuthentication getPasswordAuthentication()
String username = "user";
String password = "password";
if ((username != null) && (username.length() > 0) && (password != null)
&& (password.length () > 0))
return new PasswordAuthentication(username, password);
return null;
在您发送电子邮件的班级中：
SmtpAuthenticator authentication = new SmtpAuthenticator();
javax.mail.Message msg = new MimeMessage(Session
.getDefaultInstance(emailProperties, authenticator));
【讨论】：
我无法理解。您能否将其包含在您的答案中 如果您需要帮助，请告诉我，我会尽力帮助您 @Suhail Gupta，我已经在你之前的question 中提到过。 @RMT this is my edited code after your answer这是你要求的吗？ 我遇到了同样的错误，这解决了它，但为什么呢？为什么身份验证仅在使用身份验证器获取 Session 实例时才有效，而不是在尝试与 Transport 连接时有效，因为用户/密码显然是好的。【参考方案2】：可能值得验证 gmail 帐户是否由于多次登录尝试不成功而被锁定，您可能需要重置密码。我和你有同样的问题，结果证明这是解决方案。
【讨论】：
【参考方案3】：除了RMT的回答。我还不得不稍微修改一下代码。
-
Transport.send 应该被静态访问
因此，transport.connect 没有为我做任何事情，我只需要在初始 Properties 对象中设置连接信息。
这是我的示例 send() 方法。 config 对象只是一个愚蠢的数据容器。
public boolean send(String to, String from, String subject, String text)
return send(new String[] to, from, subject, text);
public boolean send(String[] to, String from, String subject, String text)
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", config.host);
props.put("mail.smtp.user", config.username);
props.put("mail.smtp.port", config.port);
props.put("mail.smtp.password", config.password);
Session session = Session.getInstance(props, new SmtpAuthenticator(config));
try
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
InternetAddress[] addressTo = new InternetAddress[to.length];
for (int i = 0; i < to.length; i++)
addressTo[i] = new InternetAddress(to[i]);
message.setRecipients(Message.RecipientType.TO, addressTo);
message.setSubject(subject);
message.setText(text);
Transport.send(message);
catch (MessagingException e)
e.printStackTrace();
return false;
return true;
【讨论】：
【参考方案4】：您需要将对象身份验证作为参数添加到会话中。比如
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(
"XXXX@gmail.com", "XXXXX");// Specify the Username and the PassWord
);
现在你不会得到这种异常......
javax.mail.AuthenticationFailedException: failed to connect, no password specified?
【讨论】：
【参考方案5】：您的电子邮件会话应提供如下验证器实例
Session session = Session.getDefaultInstance(props,
new Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(
"myemail@gmail.com", "password");
);
这里有一个完整的例子http://bharatonjava.wordpress.com/2012/08/27/sending-email-using-java-mail-api/
【讨论】：
【参考方案6】：import java.util.Properties;
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.InternetAddress;
import javax.mail.internet.MimeMessage;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
@SuppressWarnings("serial")
public class RegisterAction
public String execute()
RegisterAction mailBean = new RegisterAction();
String subject="Your username & password ";
String message="Hi," + username;
message+="\n \n Your username is " + email;
message+="\n \n Your password is " + password;
message+="\n \n Please login to the web site with your username and password.";
message+="\n \n Thanks";
message+="\n \n \n Regards";
//Getting FROM_MAIL
String[] recipients = new String[1];
recipients[0] = new String();
recipients[0] = customer.getEmail();
try
mailBean.sendMail(recipients,subject,message);
return "success";
catch(Exception e)
System.out.println("Error in sending mail:"+e);
return "failure";
public void sendMail( String recipients[ ], String subject, String message)
throws MessagingException
boolean debug = false;
//Set the host smtp address
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.starttls.enable", true);
props.put("mail.smtp.auth", true);
// create some properties and get the default Session
Session session = Session.getDefaultInstance(props, new Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(
"username@gmail.com", "5373273437543");// Specify the Username and the PassWord
);
session.setDebug(debug);
// create a message
Message msg = new MimeMessage(session);
InternetAddress[] addressTo = new InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++)
addressTo[i] = new InternetAddress(recipients[i]);
msg.setRecipients(Message.RecipientType.TO, addressTo);
// Optional : You can also set your custom headers in the Email if you Want
//msg.addHeader("MyHeaderName", "myHeaderValue");
// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/plain");
//send message
Transport.send(msg);
System.out.println("Message Sent Successfully");
【讨论】：
【参考方案7】：我刚遇到这个问题，解决办法是属性“mail.smtp.user”应该是你的电子邮件（不是用户名）。
gmail 用户示例：
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.user", from);
properties.put("mail.smtp.password", pass);
properties.put("mail.smtp.port", "587");
properties.put("mail.smtp.auth", "true");
【讨论】：
【参考方案8】：即使在使用 Authenticator 时，我也必须将 mail.smtp.auth 属性设置为 true。这是一个工作示例：
final Properties props = new Properties();
props.put("mail.smtp.host", config.getSmtpHost());
props.setProperty("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(config.getSmtpUser(), config.getSmtpPassword());
);
【讨论】：
【参考方案9】：我也有这个问题，不用担心。由于外部身份验证问题，它来自邮件服务器端。打开您的邮件，您会从邮件服务器收到一封邮件，告诉您启用可访问性。完成后，重试您的程序。
【讨论】：
链接 (productforums.google.com/forum/#!topic/gmail/x_gAqixiJio) 告诉您启用可访问性。你可以通过 (google.com/settings/security/lesssecureapps) 做到这一点。这解决了问题。否则，您必须进行两步验证。【参考方案10】：我已经在Transport.send 调用中解决了这个问题添加用户和密码：
Transport.send(msg, "user", "password");
根据javax.mail中send function的这个签名（来自version 1.5）：
public static void send(Message msg, String user, String password)
另外，如果您使用此签名，则无需设置任何Authenticator，并在Properties 中设置用户和密码（仅需要主机）。所以你的代码可能是：
private void sendMail()
try
Properties prop = System.getProperties();
prop.put("mail.smtp.host", "yourHost");
Session session = Session.getInstance(prop);
Message msg = #createYourMsg(session, from, to, subject, mailer, yatta yatta...)#;
Transport.send(msg, "user", "password");
catch(Exception exc)
// Deal with it! :)
【讨论】：
【参考方案11】：在 gmail 帐户的安全设置中打开“访问安全性较低的应用程序”。（来自邮件），请参阅以下链接以获取参考
http://www.ghacks.net/2014/07/21/gmail-starts-block-less-secure-apps-enable-access/
【讨论】：
【参考方案12】：此错误可能与密码字符有关。如果您的密码包含特殊字符，并且您将密码添加到 Transport 类方法中；
举例
Transport transport = session.getTransport("smtp");
transport.connect("user","passw@rd");
或
Transport.send(msg, "user", "passw%rd");
您可能会收到该错误。因为Transportclass' 方法可能无法处理特殊字符。如果您使用javax.mail.PasswordAuthentication 类将您的用户名和密码添加到您的消息中，我希望您能避免该错误；
举例
...
Session session = Session.getInstance(props, new javax.mail.Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication("user", "pas$w@r|d");
);
Message message = new MimeMessage(session);
...
Transport.send(message);
【讨论】：
【参考方案13】：看你代码的第9行，可能是错误；应该是：
mail.smtp.user
不是
mail.stmp.user;
【讨论】：
【参考方案14】：首先，在您的 Gmail 帐户中启用安全性较低的应用程序，您将从该应用程序使用此链接发送电子邮件：- https://myaccount.google.com/lesssecureapps?pli=1
然后您只需在会话创建中添加以下代码。那时它会正常工作。
Session mailSession = Session.getInstance(props, new javax.mail.Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(
"your_email", "your_password");// Specify the Username and the PassWord
);
如果您想要更详细的，请使用以下内容：-
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class MailSender
public Properties mailProperties()
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.smtp.host", "smtp.gmail.com");
props.setProperty("mail.smtp.port", "587");
props.setProperty("mail.smtp.user", "your_email");
props.setProperty("mail.smtp.password", "your_password");
props.setProperty("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.auth", "true");
return props;
public String sendMail(String from, String to, String subject, String msgBody)
Properties props = mailProperties();
Session mailSession = Session.getInstance(props, new javax.mail.Authenticator()
protected PasswordAuthentication getPasswordAuthentication()
return new PasswordAuthentication(
"your_email", "your_password");// Specify the Username and the PassWord
);
mailSession.setDebug(false);
try
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage(mailSession);
message.setSubject(subject);
message.setFrom(new InternetAddress(from));
message.addRecipients(Message.RecipientType.TO, to);
MimeMultipart multipart = new MimeMultipart();
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(msgBody, "text/html");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
transport.connect();
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
return "SUCCESS";
catch (NoSuchProviderException e)
e.printStackTrace();
return "INVALID_EMAIL";
catch (MessagingException e)
e.printStackTrace();
return "ERROR";
public static void main(String args[])
System.out.println(new MailSender().sendMail("your_email/from_email", "to_email", "Subject", "Message"));
希望！它有助于。谢谢！
【讨论】：
经过大量搜索，您的代码是唯一对我有用的代码。谢谢！！！以上是关于javax.mail.AuthenticationFailedException：连接失败，没有指定密码？的主要内容，如果未能解决你的问题，请参考以下文章