问Javamail错误: SMTPAddressFailedException: 450个来自IP的连接(速率控制)

EN

com.sun.mail.smtp.SMTPAddressFailedException: 450 too many connections from your IP (rate controlled)

at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1862)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1118)
at com.synaptic.email.MessageMail.sendMessage(MessageMail.java:152)
at com.synaptic.email.EmailManagerImpl.sendGeneralEmail(EmailManagerImpl.java:423)

    public void sendMessage(Brand brand, String timeout) throws MessagingException
{
    try {
        // Prepare message
        Properties props = new Properties();

        props.put("mail.smtp.host", mailHost);
        props.put("mail.smtp.connectiontimeout", timeout);
        props.put("mail.smtp.timeout", timeout);
        props.put("mail.smtp.writetimeout", timeout);
        props.put("mail.smtp.port", Integer.parseInt(brand.getBrandProperties().getEmailPort()));

        Session session = Session.getInstance(props);
        message = new MimeMessage(session);
        createMessage();

        if (brand.getBrandProperties().getEmailUsername().isEmpty() && brand.getBrandProperties().getEmailPassword().isEmpty()) {
            // Send email message to SMTP server without auth
            Transport.send(message);
        } else {
            // Send message with auth
            Transport.send(message,brand.getBrandProperties().getEmailUsername(),brand.getBrandProperties().getEmailPassword());
        }
    } catch (MessagingException e) {
        log.error("Failed to send email message.", e);
        throw e;
    }
}