Service.connect fails occasionally with strange error

Question

I've created an application which checks an POP3 mailbox every minute to check if there are any messages and if there are, it processes the e-mails according to some rules.
This works fine most of the time but every now and then the application fails. I can see two different error messages. The first I can understand but the second is very strange. The username and password haven't changed so it should be alright.
The problem with this is that if I try to connect to the server from Outlook or any other e-mailclient it works fine even at times when my application don't.
Have anybody seen anything like this?
Stacktrace:
Connect failed;
  nested exception is:
     java.net.ConnectException: Connection timed out: connect
javax.mail.MessagingException: Connect failed;
  nested exception is:
     java.net.ConnectException: Connection timed out: connect
     at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:106)
     at javax.mail.Service.connect(Service.java:233)
     at javax.mail.Service.connect(Service.java:134)
     at biz.MailMethods.readEmail(MailMethods.java:167)
     at application.MailReaderTask.run(MailReaderTask.java:113)
     at java.util.TimerThread.mainLoop(Timer.java:432)
     at java.util.TimerThread.run(Timer.java:382)
EOF on socket
javax.mail.AuthenticationFailedException: EOF on socket
     at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:104)
     at javax.mail.Service.connect(Service.java:233)
     at javax.mail.Service.connect(Service.java:134)
     at biz.MailMethods.readEmail(MailMethods.java:167)
     at application.MailReaderTask.run(MailReaderTask.java:113)
     at java.util.TimerThread.mainLoop(Timer.java:432)
     at java.util.TimerThread.run(Timer.java:382)Code:
try {
  Properties props = new Properties();
  Session session = Session.getDefaultInstance(props, null);
  Store store = session.getStore("pop3");
  store.connect(server, username, password);
  Folder folder = store.getFolder("INBOX");
  folder.open(Folder.READ_WRITE);
  Message messages[] = folder.getMessages();
  String from = null;
  MimeMessage mm = null;
  for (int i = 0; messages != null && i < messages.length; i++) {
    mm = (MimeMessage) messages;
from = ((InternetAddress)mm.getFrom()[0]).getAddress();
if ("[email protected]".equals(from)) {
} else {
messages[i].setFlag(Flags.Flag.DELETED, true);
folder.close(true);
store.close();
} catch (Exception e) {
e.printStackTrace();

Answer 1

HI
I have a similar scenario whr the connect fails ..
I shal be gr8ful to u, if u cud let me know how u resolved this problem
my email id is [email protected]
with regards
Kalyan