DEBUG SMTP: exception reading response

Question

Hello,
I am coding a background process to send e-mails. It uses Threads so each Thread opens a connection with a local smtp server and send a configured amount of e-mails.
It goes well when there aren't too many Threads, but in opposite to that i receive the following message :
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: starting protocol to host "localhost", port 25
DEBUG SMTP: exception reading response: java.net.SocketException: Connection reset
MessagingException - Exception reading response; nested exception is: java.net.SocketException: Connection reset
Considering that it is happening initially because the smtp server got overload because the amount of connections i did the following:
Transport t = mailSession.getTransport("smtp");
while(t.isConnected() != true) {
     try {
          t.connect();
     } catch (MessagingException me){
          try {
               Thread.sleep(rand.nextInt(n));
          } catch (InterruptedException ie){
               Log.info("Thread Name/ID: " + jobObj.getName() + " / " + jobObj.getId() + " - " + "Exception : InterruptedException - " + ie.getMessage());                         
          Log.info("Connect: Thread Name/ID: " + jobObj.getName() + " / " + jobObj.getId() + " - " + "Exception : MessagingException - " + me.getMessage());               
Then i do send the respective e-mails for each Thread using :
t.sendMessage();
and i do close the connection after all the e-mails were sent with
t.close();
This is just a small snippet of the code, but represents the loop i am trying to create to solve my problem, which is smtp connections overload. So when the connection is not really established i put the Thread to sleep and then it tries again latter until the success of the connection. It seems to work for some Threads but others keep returning the same error and don't work well.
Can anyone help me on this ?
Thx in advance

Answer 1

Hi,
I face similar problem with same error message. Have you found the solution yet? Could you share with me?
Thanks,
Lngo