Cannot collect email from IMAP server powered by hMailServer

2015-05-12 15:45:00,093 ERROR [scheduler_Worker-5] [confluence.mail.archive.DefaultMailAccountManager] poll Error retrieving mail from IMAP account [confluence@<IMAP_SERVER>:143] for space <SPACENAME>: IOException while copying message
javax.mail.MessagingException: IOException while copying message;
nested exception is:
com.sun.mail.util.FolderClosedIOException
at javax.mail.internet.MimeMessage.<init>(MimeMessage.java:247)
at com.atlassian.confluence.mail.archive.DefaultMailAccountManager.retrieveMessages(DefaultMailAccountManager.java:176)
at com.atlassian.confluence.mail.archive.DefaultMailAccountManager.poll(DefaultMailAccountManager.java:133)
at com.atlassian.confluence.mail.archive.DefaultMailAccountManager.poll(DefaultMailAccountManager.java:88)
at com.atlassian.confluence.mail.archive.DefaultMailAccountManager.pollAllSpaces(DefaultMailAccountManager.java:298)
at com.atlassian.confluence.mail.archive.jobs.MailPollJob$1.doInTransaction(MailPollJob.java:35)
at com.atlassian.confluence.mail.archive.jobs.MailPollJob$1.doInTransaction(MailPollJob.java:31)
at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
at com.atlassian.sal.spring.component.SpringHostContextAccessor$1.doInTransaction(SpringHostContextAccessor.java:88)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128)
at com.atlassian.sal.spring.component.SpringHostContextAccessor.doInTransaction(SpringHostContextAccessor.java:82)
at sun.reflect.GeneratedMethodAccessor164.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:134)
at com.sun.proxy.$Proxy217.doInTransaction(Unknown Source)
at sun.reflect.GeneratedMethodAccessor164.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:154)
at com.sun.proxy.$Proxy217.doInTransaction(Unknown Source)
at com.atlassian.sal.core.transaction.HostContextTransactionTemplate.execute(HostContextTransactionTemplate.java:21)
at sun.reflect.GeneratedMethodAccessor2193.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy2844.execute(Unknown Source)
at com.atlassian.confluence.mail.archive.jobs.MailPollJob.doExecute(MailPollJob.java:31)
at com.atlassian.quartz.jobs.AbstractJob$1.doInHibernate(AbstractJob.java:133)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:370)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:337)
at com.atlassian.quartz.jobs.AbstractJob.executeInternal(AbstractJob.java:125)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at com.atlassian.scheduler.quartz1.Quartz1JobFactory$ClassLoaderProtectingWrappedJob.execute(Quartz1JobFactory.java:62)
at org.quartz.core.JobRunShell.run(JobRunShell.java:223)
at com.atlassian.confluence.schedule.quartz.ConfluenceQuartzThreadPool$1.run(ConfluenceQuartzThreadPool.java:22)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
Caused by: com.sun.mail.util.FolderClosedIOException
at com.sun.mail.imap.IMAPInputStream.forceCheckExpunged(IMAPInputStream.java:100)
at com.sun.mail.imap.IMAPInputStream.fill(IMAPInputStream.java:150)
at com.sun.mail.imap.IMAPInputStream.read(IMAPInputStream.java:208)
at com.sun.mail.imap.IMAPInputStream.read(IMAPInputStream.java:234)
at com.sun.mail.imap.IMAPMessage.writeTo(IMAPMessage.java:721)
at javax.mail.internet.MimeMessage.<init>(MimeMessage.java:238)
... 51 more