title: AuthenticationFailedException: AUTHENTICATE failed After some connections
body: <p>I have a <code>Spring-Boot (1.4.0)</code> application and I am using <code>springframework.boot:spring-boot-starter-mail</code>.</p>
  
  <p>I have a method annotated with <code>@Scheduled</code> to check my inbox every a certain period of time.</p>
  
  <p>This is how I get my inbox:</p>
  
  <pre><code>private static Folder getInbox() throws MessagingException {
  final String protocol = "mail.store.protocol";
          final String storeType = "imaps";
          final String email = "email";
          final String password = "password";
          final String connect = "webmail.company.com";
          final String folder = "INBOX";
  
          final Properties props = new Properties();
          props.setProperty(protocol, storeType);
  
          final Session session = Session.getInstance(props, null);
          final Store store = session.getStore();
          store.connect(connect, email, password);
  
          final Folder inbox = store.getFolder(folder);
          inbox.open(Folder.READ_WRITE);
          return inbox;
      }
  </code></pre>
  
  <p>Then I have this:</p>
  
  <pre><code>@Scheduled(fixedRate = 10000)
      @Override
      public void checkEmailCreateCompanyAndSendCsv() throws MessagingException, IOException {
      log.info("Checking e-mail...");
              final Folder inbox = getInbox();
  
              final Flags seen = new Flags(Flags.Flag.SEEN);
              final FlagTerm unseenFlagTerm = new FlagTerm(seen, false);
  
              inbox.getMessages();
              final Message messages[] = inbox.search(unseenFlagTerm);
  
  
  .....
  .....
  }
  </code></pre>
  
  <p>When the APP is running everything works great but after some time (around 7 to 8 e-mail checks) it starts to thrown an exception:</p>
  
  <blockquote>
    <p>javax.mail.AuthenticationFailedException: AUTHENTICATE failed.    at
    com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:717)   at
    javax.mail.Service.connect(Service.java:366)  at
    javax.mail.Service.connect(Service.java:246)  at
    com.opessoftware.crs.selfcertification.services.EmailServiceBasic.getInbox(EmailServiceBasic.java:183)
      at
    com.opessoftware.crs.selfcertification.services.EmailServiceBasic.checkEmailCreateCompanyAndSendCsv(EmailServiceBasic.java:50)
      at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)     at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)     at
    org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
      at
    org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
      at
    java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
      at
    java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
      at
    java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
      at
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)</p>
  </blockquote>
  
  <p>If I stop the application and run it again the error disappears and the cicle starts again. </p>
  
  <p>Any suggestions?</p>