[Java Mail] How to check Exchange Server status?

Problem
If I would like to write a Java code to check the status of SMTP server, how to do it?

How-to
The sample code is as bellows:

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package albert.practice.mail; import java.util.Properties; import javax.mail.MessagingException; import javax.mail.NoSuchProviderException; import javax.mail.Session; import javax.mail.Transport; import lombok.extern.slf4j.Slf4j; import org.springframework.mail.javamail.JavaMailSenderImpl; /** * Used to check the status of exchange server . */ @Slf4j public class CheckSmtpStatus { /** * The main method. * * @param args * the arguments * @throws MessagingException * the messaging exception */ public static void main(String[] args) throws MessagingException { String host = "smtp host name"; int port = 25; String emailU = "username"; String emailP = "password"; CheckSmtpStatus checkSmtpStatus = new CheckSmtpStatus(); boolean isConnected = checkSmtpStatus.isConnected(host, port, emailU, emailP); log.debug("isConnected = " + isConnected); } /** * Checks if is connected. * * @param host * the host * @param port * the port * @param emailU * the email u * @param emailP * the email p * @return true, if is connected * @throws MessagingException * the messaging exception */ public boolean isConnected(String host, int port, String emailU, String emailP) throws MessagingException { boolean isConnected = false; Transport transport = null; Session session = createJavaMailSender(host, port, emailU, emailP); try { transport = session.getTransport("smtp"); transport.connect(host, port, emailU, emailP); // used to check this SMTP service is currently connected or not isConnected = transport.isConnected(); } catch (NoSuchProviderException e) { throw new RuntimeException(e); } catch (MessagingException e) { throw new RuntimeException(e); } finally { transport.close(); } return isConnected; } private Session createJavaMailSender(String host, int port, String emailU, String emailP) { Properties properties = new Properties(); properties.setProperty("mail.debug", "true"); properties.setProperty("mail.smtp.auth", "true"); properties.put("mail.smtp.ssl.trust", "*"); JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl(); javaMailSender.setJavaMailProperties(properties); javaMailSender.setHost(host); javaMailSender.setPort(port); javaMailSender.setDefaultEncoding("UTF-8"); javaMailSender.setUsername(emailU); javaMailSender.setPassword(emailP); return javaMailSender.getSession(); } }