SMTP email with javax.mail config issues - smtp

Question

I can send emails from a linux server by typing the following on the console, without any issues:
mail -s "Test Subject" testemail#gmail.com < /dev/null
I try to send it via a Java app, using javax.mail via:
public void sendMail() throws MessagingException
{
final Properties p = new Properties();
p.put("mail.smtp.host", "localhost");
final Message msg = new MimeMessage(Session.getDefaultInstance(p));
msg.setFrom(new InternetAddress(from));
msg.addRecipient(RecipientType.TO, new InternetAddress(to));
msg.setSubject("Test");
msg.setText(body);
Transport.send(msg);
}
but I get a
Causing: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1
error, is this due cause I need to replace
p.put("mail.smtp.host", "localhost");
with my server's address? if yes, where can I find what I should put there?
Thanks!

Answer 1

Do you have a mail server running on your local machine?
Have you configured sendmail to route messages to your mail server?
If you run "mail -v ..." it should tell you what the mail command is doing to send your message.
But yes, most likely, you want to configure JavaMail to connect directly to your mail server, which is probably not running on your local machine. You'll find more help in the JavaMail FAQ.