java - 无需身份验证/没有发件人密码即可发送 java 电子邮件

Question

我正在尝试发送没有发件人密码的 java 电子邮件。您可以在下面看到代码。我将 mail.smtp.auth 从 true 更改为 false。有一个覆盖方法，方法名称 getPasswordAuthentication():

public class SendMailUtilNineThirty implements Runnable {

    final private String SMTP_SERVER = "192.186.16.14";
    final private String SMTP_PORT = "135";
    final private String TO_EMAIL = "saman@thal.com";
    final private String TO_EMAIL = "dumidu@thal.com";
    final private String FROM_EMAIL = "samanchandana@thal.com";
    final private String FROM_EMAIL_PASSWORD = "1qaz2wsx@";

public void sendEmail(String emailContent, String subject) {
        try {
            Properties props = new Properties();
            props.put("mail.transport.protocol", "smtp");
            props.put("mail.smtp.host", SMTP_SERVER);
            props.put("mail.smtp.port", SMTP_PORT);
            props.put("mail.smtp.auth", "false");
            Session mailSession = Session.getInstance(props, new Authenticator() {
                @Override
                public PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(FROM_EMAIL, FROM_EMAIL_PASSWORD);
                }
            });

            mailSession.setDebug(true);
            MimeMessage message = new MimeMessage(mailSession);
            message.setFrom(new InternetAddress(FROM_EMAIL));
            message.addHeader("site", "thal.com");
            message.addHeader("service", "Thal Service");
            message.setSentDate(new Date());
            message.addRecipients(Message.RecipientType.TO, InternetAddress.parse(TO_EMAIL));
            message.setSubject(subject);

如何在没有密码验证的情况下发送电子邮件？谢谢。

Answer 1

一般来说，您需要向邮件服务器进行身份验证。如果您运行自己的邮件服务器，您可以将其设置为不需要身份验证，但没有任何公共(public)电子邮件服务供应商会允许这样做，我希望这是显而易见的原因。