Commons email example hanging on send()

Question

I'm trying to get this example for the Apache Commons email library to work. Here is my code:

    SimpleEmail email = new SimpleEmail();      
    email.setHostName("smtp.gmail.com");
    email.setSmtpPort(465);
    email.setAuthenticator(new DefaultAuthenticator("username@gmail.com", "password"));     
    email.setTLS(true); 
    try {
        email.setFrom("username@gmail.com");
        email.setSubject("TestMail");
        email.setMsg("This is a test mail ... :-)");
        email.addTo("username@gmail.com");
        System.out.println("Sending...");
        email.send();
        System.out.println("Email sent!");

    } catch (Exception e) {
        System.out.println("Email not sent!");
        e.printStackTrace();
    }

As you can see it's basically unchanged from the example, except I have to use port 465 instead of 587 because 587 causes a Connection refused exception (based on this question). Now this code is hanging on the email.send() line. The only output I get is:

Sending...

But no exceptions are thrown. Do I need to open a port in my firewall? (I might not be able to do that as I'm trying to do this from work). Thanks!

Edit

After a long time I get this exception:

org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.gmail.com:465
...
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1

If you try to telnet from the command line, can you? $ telnet smtp.gmail.com 465 // If you're running linux, no problem, with windows, you may need to add the telnet program, just go to the control panel and add it in the windows components. — stivlo, Sep 29 '11 at 14:30
I cannot. telnet hangs for a while and then fails silently. However, see my edit above. — andronikus, Sep 29 '11 at 15:41

score 1 · Accepted Answer · answered Sep 29 '11 at 15:44

1

Based on your edits and answer to my comment, you shouldn't look for your problems in Java code, but in the firewall or your network configuration.

answered Sep 29 '11 at 15:44

stivlo

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Indeed, there's a mail relay server I need to use, TPS reports to fill out, etc etc. I was really hoping to learn something here too D:. Oh well, have some reputation, and thanks! – andronikus Sep 30 '11 at 13:59

score 0 · Answer 2 · answered Feb 16 '15 at 14:41

You need to set the following (because you are using SSL)

Properties props = new Properties();
props.put("mail.smtp.auth", true);
    props.put("mail.smtp.starttls.enable", true);
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.timeout" , "10000");
    props.put("mail.smtp.connectiontimeout" , "10000");
    props.put("mail.smtp.socketFactory.port", 465);
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.socketFactory.fallback", "false");

Also it is hanged because you didn't set the timeout properties — Bassel Kh, Feb 16 '15 at 14:42

Commons email example hanging on send()

Edit

2 Answers2