JAVAMAIL - IMAP Connection Failure: "* BYE disconnecting"

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Date: Mon, 23 Feb 2004 11:06:00 +0100

Hi @ll,

I using the Java Mail API to access a mail server over IMAP.

Step-By-Step Program:
 1) Get all folders from the IMAP account
     - open connection to the store
     - accessing mail server and get folder structure
     - close connection to the store
 2) Get the emails for each account (loop)
     - open connection to the store
     - open current folder
     - accessing mail server and get emails of opened folder
     - close current folder
     - close connection to the store

Problem:
 In the second step the program throws a MessagingException
 "* BYE Disonncetion". Some times by the first iteration othertimes
 on the seconde and so on.

How I solved that problem (code snippet):
 ....
  int numOfTries = 0;
  int MAX_NUM_OF_TRIES = 10;
  boolean connected = false;
  while(!connected || numOfTries > MAX_NUM_OF_TRIES)
  {
      try
      {
          store.connect(
          storeInfo.getServerAddress(),
                          storeInfo.getUsername(),
                          storeInfo.getPassword());
          connected = true;
      }
      catch (MessagingException e)
      {
          System.out.println("Connection failed: Number of Try = " + numOfTries);
          System.out.println("Exception Message: " + e.getMessage());
        
          numOfTries++;
        
          try
          {
              Thread.sleep(500);
          }
          catch (InterruptedException e1)
          {
          }
      }
  }
....

With this code it works, but the mail client has to try connecting 4 times! That
means it takes up to 2 seconds for accesing the system! I think this it is not really
the best solution, it takes ~four times longer to establish a connection to the
server!

Questions:
 - Does somebody know that problem and how has he/she solved that?
 - Is there another way to solve it?
 - This problem lies on the serverside - Is that true?
 - Is this a familiar problem of IMAP mail servers?

Thanks a lot for helping!
Greetz,
Dani

-- 
NOTE:
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