Why JavaMail connection timeout is too long

Question

In my application I connect to server to authenticate users. This is code:

try {         Properties prop = new Properties();         prop.put("mail.smtp.starttls.enable","true");         prop.put("mail.smtp.auth", "true");         prop.put("mail.smtp.connectiontimeout", 1000);           Session session = Session.getInstance(prop, null);         Transport transport = session.getTransport("smtp");         transport.connect("mion.elka.pw.edu.pl", 587, registerLog, registerPass);         transport.close();         return true;     } catch (NoSuchProviderException ex) {         Logger.getLogger(RegisterController.class.getName()).log(Level.SEVERE, null, ex);         return false;     } catch(AuthenticationFailedException ex) {         Logger.getLogger(RegisterController.class.getName()).log(Level.SEVERE, null, ex);         return false;     } catch (MessagingException ex) {         Logger.getLogger(RegisterController.class.getName()).log(Level.SEVERE, null, ex);         return false;     } 

I set connection timeout to 1000 ms = 1s but it's ignore. When i debug and set wrong username and password i catch

javax.mail.MessagingException: java.net.SocketTimeoutException: Read timed out 

not after 1000 ms, but after 5000*60 ms = 5 min

What is wrong ? How can i reduce timeoute ?

Answer 1

Can you setup the Socket I/O timeout as well. When it is connected but failed to read data from the server then it will continue to wait.

prop.put("mail.smtp.timeout", 1000); 

Read timeout indicates you are connected but not able to read data from the server.