javax.mail.MessagingException: Could not connect to SMTP host: 172.16.100.185, port: 25;

Question

I have written a simple program to send an email using Java API. Below is the code. following that is the error message I get.

        String host = "172.16.100.185";
        final String user = "anand.rajendran@*****.net";

        String to = "anand.rajendran@*****.net";

        // Get the session object
        Properties props = new Properties();
        props.put("mail.smtp.host", host);
        //props.put("mail.smtp.port", "587");


        Session session = Session.getDefaultInstance(props,null);

        // Compose the message
        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(user));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("My subject");
            message.setText("This is simple program of sending email using JavaMail API");

            // send the message
            Transport.send(message);

        } catch (MessagingException e) {
            e.printStackTrace();
        }

Error:

javax.mail.MessagingException: Could not connect to SMTP host: 172.16.100.185, port: 25;
  nested exception is:
    java.net.SocketException: Permission denied: connect
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1282)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
    at javax.mail.Service.connect(Service.java:275)
    at javax.mail.Service.connect(Service.java:156)
    at javax.mail.Service.connect(Service.java:105)
    at javax.mail.Transport.send0(Transport.java:168)
    at javax.mail.Transport.send(Transport.java:98)
    at com.photon.bigdata.heartbeat.service.impl.HeartBeatServiceImpl.sendFailureReportEmail(HeartBeatServiceImpl.java:167)
    at com.photon.bigdata.heartbeat.controller.HeartBeatController.sendReport(HeartBeatController.java:62)
    at com.photon.bigdata.heartbeat.controller.HeartBeatController.main(HeartBeatController.java:33)
Caused by: java.net.SocketException: Permission denied: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
    ... 9 more

FYI, I tried the following as well.

1) I tried with port numbers: 25, 465 and 587.

props.put("mail.smtp.port", "465");
props.put("mail.smtp.port", "587");

2) Checked the status of sendMail in the host

[root@stormcluster1 ~]# service sendmail status
sendmail (pid  13898) is running...
sm-client (pid  13910) is running...

3) In the host, I checked if SMTP server is listening at port 25

[root@stormcluster1 ~]# lsof -i :25
COMMAND    PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
sendmail 13898 root    4u  IPv4 2172898      0t0  TCP localhost:smtp (LISTEN)

4) Was able to send email from the Linux terminal

I was successfully able to send an email to my email address from the linux box where the SMPT server is up and running using the following command. mail -s "from 44 with sudo access" anand.rajendran@*****.net

The "permission denied" would indicate the firewall on the machine running the java code prevents your program from making network connections. Are you running that on windows? — Kenney, Feb 16 '16 at 13:26
[Refer](http://stackoverflow.com/questions/11029444/javax-mail-messagingexception-could-not-connect-to-smtp-host) — thar45, Feb 16 '16 at 13:36
@GK27: I tried that option already, but it didn't help either. — Andy, Feb 16 '16 at 13:41
I think you may need to [allow Java through the firewall](http://windows.microsoft.com/lo-la/windows-vista/allow-a-program-to-communicate-through-windows-firewall). — Kenney, Feb 16 '16 at 13:57
Have you tried [telnet from the client machine to the server](http://www.oracle.com/technetwork/java/javamail/faq/index.html#condebug)? Is your code running in an application server with a security manager? You may need to [configure the Java security permissions needed by your application](http://www.oracle.com/technetwork/java/javamail/faq/index.html#securityManager). — Bill Shannon, Feb 16 '16 at 18:53

score 0 · Accepted Answer · answered Feb 18 '16 at 13:48

0

the issue was with the configuration file of the SMPT server installed. I pointed my java application to a different machine where another SMTP server was running. It worked fine. :) thanks to all for your time and effort!! cheers

answered Feb 18 '16 at 13:48

Andy

5,433
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score -1 · Answer 2 · edited May 23 '17 at 10:28

-1

Found some references suggesting that this is Java-7 related:
JavaMail API to iMail -- java.net.SocketException: Permission denied: connect

https://confluence.atlassian.com/display/STASHKB/Mail+Server+Connection+Failed+With+'java.net.SocketException%3A+Permission+denied%3A+connect.'+Exception

Those pages guive workarounds.

edited May 23 '17 at 10:28

Community

1
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answered Feb 16 '16 at 13:27

ernest_k

44,416
5
53
99

javax.mail.MessagingException: Could not connect to SMTP host: 172.16.100.185, port: 25;

1) I tried with port numbers: 25, 465 and 587.

2) Checked the status of sendMail in the host

3) In the host, I checked if SMTP server is listening at port 25

4) Was able to send email from the Linux terminal

2 Answers2