MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1

Question

I need to send an email from my application using Gmail as the SMTP server. This is my mail connector class and I have set values in a separate property file

    public class EmailConnector {
    

    public static Session sessionCreate() {
        final String fromEmail = ConfigurationManager.getInstance().getProperty(EmailConfig.SENDER_EMAIL.toString());

        final String password = ConfigurationManager.getInstance().getProperty(EmailConfig.SENDER_PASSWORD.toString());

        Properties props = new Properties();
        props.put("mail.smtp.host", ConfigurationManager.getInstance().getProperty(EmailConfig.SMTP_HOST.toString()));

        props.put("mail.smtp.socketFactory.port",
                ConfigurationManager.getInstance().getProperty(EmailConfig.SSL_PORT.toString()));

        props.put("mail.smtp.socketFactory.class",
                ConfigurationManager.getInstance().getProperty(EmailConfig.SSL_FACTORY_CLASS.toString()));

        props.put("mail.smtp.auth",
                ConfigurationManager.getInstance().getProperty(EmailConfig.SMTP_AUTHENTICATION.toString()));

        props.put("mail.smtp.port", ConfigurationManager.getInstance().getProperty(EmailConfig.SMTP_PORT.toString()));

        Authenticator auth = new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(fromEmail, password);
            }
        };
        return Session.getDefaultInstance(props, auth);
    }
}

Properties:

#Email send configuration
SENDER_EMAIL = abcalerts@gmail.com
SENDER_PASSWORD = abcalert321
SMTP_HOST = smtp.gmail.com
SSL_PORT = 465
SMTP_AUTHENTICATION = true
SMTP_PORT = 465
SSL_FACTORY_CLASS = javax.net.ssl.SSLSocketFactory

Then I implemented a mail sender class, called "GroupEmail.class"

public class GroupEmail {

    public void sendEmail() throws IOException {
        String recipient = "nirmalauwucst@gmail.com";

        Session session = EmailConnector.sessionCreate();
        /* subject of email */
        String emailSubject = "ABC_Alert";
        try {
            MimeMessage msg = new MimeMessage(session);
            msg.addHeader("Content-type", "text/HTML; charset=UTF-8");
            msg.addHeader("format", "flowed");
            msg.addHeader("Content-Transfer-Encoding", "8bit");

            msg.setFrom(new InternetAddress("abcalerts@gmail.com", "ABC Alerts"));

            msg.setReplyTo(InternetAddress.parse("abcalerts@gmail.com"));

            msg.setSubject(emailSubject, "UTF-8");

            msg.setSentDate(new Date());
            /* buyer email address */
            msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipient));

            /* Create the message body part */
            msg.setText("A new Test-Alert from AB_Alerts");

            /* Send message */
            Transport.send(msg, "abcalerts@gmail.com", "abcalert321");

        } catch (MessagingException | UnsupportedEncodingException e) {
            SystemLogger.logErrorMessege(this, e);
        }
    }

}

After all I called the "GroupEmail.class" in a place that I needed to trigger the email to be sent.

GroupEmail groupEmail = new GroupEmail();
        groupEmail.sendEmail();

I used Tomcat v8 server on localhost and when the application works, I got the below exception.

98656 [http-nio-8080-exec-9] ERROR it.nmad.test.abcalert.notification.template.email.GroupEmail  - Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1;
  nested exception is:
    java.net.SocketException: Permission denied: connect
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2100)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:699)
    at javax.mail.Service.connect(Service.java:388)
    at javax.mail.Service.connect(Service.java:246)
    at javax.mail.Service.connect(Service.java:195)
    at javax.mail.Transport.send0(Transport.java:254)
    at javax.mail.Transport.send(Transport.java:124)
..more

Bill Shannon · Accepted Answer

Fix these common JavaMail mistakes.

Follow the connection debugging tips in the JavaMail FAQ.

Most likely there's a firewall or anti-virus product that's preventing you from connecting.

If Tomcat is running with a Java security manager, the JavaMail FAQ has information about configuring security permissions. If that doesn't help, the JavaMail FAQ also has information about debugging problems with security permissions.

Did I mention that you should read the JavaMail FAQ? :-)

MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1

Answers (2)

Related Questions

MailConnectException: Couldn&#39;t connect to host, port: smtp.gmail.com, 465; timeout -1

Answers (2)

Related Questions

MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1