JavaMail在Windows平台下正常发送邮件，部署到Linux后则发送失败

[xiaofuqw123]

private boolean text(String em, String cdk) throws Exception {

boolean fl = false;

Properties props = new Properties();

props.setProperty("mail.transport.protocol","smtp");
props.setProperty("mail.smtp.host",myEmailSMTPHost);
props.setProperty("mail.smtp.auth","true");

props.put("mail.smtp.starttls.enable","true");

Session session = Session.getDefaultInstance(props);
session.setDebug(true); // 设置为debug模式, 可以查看详细的发送 log
MimeMessage message = createMimeMessage(session,myEmailAccount,em,cdk);

Transport transport = session.getTransport();
transport.connect(myEmailAccount,myEmailPassword);
transport.sendMessage(message,message.getAllRecipients());
transport.close();
fl = true;
return fl;
}

private static MimeMessage createMimeMessage(Session session, String sendMail, String receiveMail, String cdk) throws Exception {

// 1. 创建一封邮件
MimeMessage message = new MimeMessage(session);

// 2. From: 发件人
message.setFrom(new InternetAddress(sendMail,"验证码5分钟有效，请妥善保管。","UTF-8"));

// 3. To: 收件人）
message.setRecipient(MimeMessage.RecipientType.TO,new InternetAddress(receiveMail,receiveMail,"UTF-8"));

// 4. Subject: 邮件主题
message.setSubject("坚果邮箱验证码","UTF-8");

// 5. Content: 邮件正文
message.setContent(cdk,"text/html;charset=UTF-8");

// 6. 设置发件时间
message.setSentDate(new Date());

// 7. 保存设置
message.saveChanges();

return message;
}

我应该怎么办- -急