代替
props.put（“ mail.transport.protocol”，“ smtps”）;
运输运输= session.getTransport（“ smtps”）;
用
props.put（“ mail.transport.protocol”，“ smtp”）;
运输运输= session.getTransport（“ smtp”）;
使用 smtp 而不是smtps
我使用了JDK 8，Netbeans 8，JavaMail 1.5.2，该示例 运行良好 ：
public static void main(String[] args) { Properties props = new Properties(); props.put("mail.smtp.host", "smtp.gmail.com"); 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, new javax.mail.Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("username@gmail.com","password"); } }); try { Message message = new MimeMessage(session); message.setFrom(new InternetAddress("frommail@gmail.com")); message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("tomail@gmail.com")); message.setSubject("Testing Subject"); message.setText("Test Mail"); Transport.send(message); System.out.println("Done"); } catch (MessagingException e) { throw new RuntimeException(e); }}如果您无法连接端口465，请尝试端口587
