使用 java mail-api 发送电子邮件失败

Question

拼命想给自己发邮件：

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

Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.web.de");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");

    Session session = Session.getInstance(props);

    Message msg = new MimeMessage(session);
    try {
        msg.setFrom(new InternetAddress("myveryownemail@web.de"));
        msg.setRecipients(Message.RecipientType.TO, new InternetAddress[]{new InternetAddress("myveryownemail@web.de")});
        msg.setSubject("whatever");
        msg.setContent("whatever", "text/plain");

        Transport transport = session.getTransport("smtp");
        transport.connect("smtp.web.de", 587, "myveryownemail", "myveryownandcorrectpassword");

        Transport.send(msg);
    } catch (MessagingException e) {
        e.printStackTrace();
    }

我得到
javax.mail.AuthenticationFailedException: 连接失败，没有指定密码？
但用户名和密码是绝对正确的（尝试使用和不使用@web.de 的用户名）。密码是我用于正常登录我的邮件帐户的密码。
不明白

Answer 1

使用您的 smtp 用户和密码设置以下属性

props.put("mail.smtp.user", "myuser");
props.put("mail.smtp.password", "mypwd");

参考：http://www.tutorialspoint.com/java/java_sending_email.htm

Answer 2

Create the javax.mail.Session object like below, with your username and password:-

 Session session = Session.getInstance(props,
          new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
          });

参考教程：- http://www.mkyong.com/java/javamail-api-sending-email-via-gmail-smtp-example/

Answer 3

过去我解决了类似的问题添加这个：

if ("true".equals(emailConfig.get("mail.smtp.auth"))) {
    session = Session.getInstance(properties, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(emailConfig.get("mail.smtp.user"), emailConfig.get("mail.smtp.password"));
        }
    });
}

Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(emailFromAddress));
msg.setRecipient(Message.RecipientType.TO, new InternetAddress(emailToAdrress));
msg.setSubject(mailSubject);
msg.setText(mailMessageBody);
Transport.send(msg);

会话是 javax.mail.Session

Answer 4

希望您在项目中包含 "mail.jar" 和 "activation.jar"。这个link可能对你有帮助

Answer 5

您正在调用 Transport.send 静态方法，它会忽略您创建和连接的 Transport 实例。请改为调用 sendMessage 方法，或跳过创建您自己的 Transport 实例并调用采用用户名和密码的静态发送方法。

这是 JavaMail common mistakes 之一。

使用 java mail-api 发送电子邮件失败

sending email using java mail-api fails

java

jakarta-mail