Incoming mail handler error

[Radgalf]

Hi.

I use Jira Software Server v8.5.1.

Some time ago, my Exchange 2016 imap (993 port) incoming mail processing became very slow (processing latency up to 10 hours) and errors occur. The problem may arise when a file with attachments larger than 2 MB appears in the processing queue. I need to know if this is a Jira or Exhcange issue.

Mail handling is very important to me. please help

Error logs

2020-07-30 22:25:20,659 ERROR [MainIncomingMail] Caesium-1-1 anonymous NameHandler[10100]: The connection is no longer open, messages marked as deleted will not be purged from the remote server: smtp.<Domain Name>until the next run.
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:382) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:454) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:430) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:435) [atlassian-scheduler-caesium-3.0.2.jar:?]
at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90) [atlassian-scheduler-core-3.0.0.jar:?]
at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106) [atlassian-scheduler-core-3.0.0.jar:?]
at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134) [atlassian-scheduler-core-3.0.0.jar:?]
at com.atlassian.jira.service.ServiceRunner.runJob(ServiceRunner.java:32) [classes/:?]
at com.atlassian.jira.service.ServiceRunner.runServiceId(ServiceRunner.java:44) [classes/:?]
at com.atlassian.jira.service.ServiceRunner.runService(ServiceRunner.java:62) [classes/:?]
at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:68) [classes/:?]
at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:229) [jira-api-8.5.1.jar:?]
at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:395) [jira-api-8.5.1.jar:?]
at com.atlassian.jira.service.services.mail.MailFetcherService.processMessages(MailFetcherService.java:403) [jira-api-8.5.1.jar:?]
at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:271) [jira-api-8.5.1.jar:?]
at com.atlassian.jira.service.services.mail.MailFetcherService.processMessage(MailFetcherService.java:414) [jira-api-8.5.1.jar:?]
at com.onresolve.scriptrunner.mail.MailHandler.handleMessage(MailHandler.groovy:90) [?:?]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:298) [?:?]
at org.codehaus.groovy.runtime.callsite.GetEffectivePojoPropertySite.getProperty(GetEffectivePojoPropertySite.java:63) [?:?]
at org.codehaus.groovy.runtime.metaclass.MethodMetaProperty$GetBeanMethodMetaProperty.getProperty(MethodMetaProperty.java:76) [?:?]
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) [?:?]
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101) [?:?]
at java.lang.reflect.Method.invoke(Method.java:498) [?:1.8.0_202]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [?:1.8.0_202]
at sun.reflect.GeneratedMethodAccessor2551.invoke(Unknown Source) [?:?]
at com.sun.mail.imap.IMAPMessage.getSubject(IMAPMessage.java:441) [javax.mail-1.6.0.jar:1.6.0]
at com.sun.mail.imap.IMAPMessage.loadEnvelope(IMAPMessage.java:1488) [javax.mail-1.6.0.jar:1.6.0]
at com.sun.mail.imap.IMAPMessage.getProtocol(IMAPMessage.java:169) [javax.mail-1.6.0.jar:1.6.0]
javax.mail.FolderClosedException
2020-07-30 22:25:20,513 ERROR [MainIncomingMail] Caesium-1-1 anonymous NameHandler[10100]: The folder has been closed on us, stop processing any more emails: null