Complete error message is:
2021-01-11 14:00:32,430 Caesium-1-4 ERROR anonymous <mailadress-placeholder>[c.a.jira.mail.MailThreadManagerImpl] Error occurred while determining message id of an e-mail message.
javax.mail.MessageRemovedException
at com.sun.mail.imap.IMAPMessage.checkExpunged(IMAPMessage.java:278)
at com.sun.mail.imap.IMAPMessage.getHeader(IMAPMessage.java:860)
at com.atlassian.jira.mail.MailThreadManagerImpl.getAssociatedIssueObjects(MailThreadManagerImpl.java:75)
at com.atlassian.jira.mail.MailThreadManagerImpl.getAssociatedIssueObject(MailThreadManagerImpl.java:108)
at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.getAssociatedIssue(AbstractMessageHandler.java:1507)
at com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:74)
at com.atlassian.jira.service.services.mail.MailFetcherService.processMessage(MailFetcherService.java:415)
at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:272)
at com.atlassian.jira.service.services.mail.MailFetcherService.processMessages(MailFetcherService.java:404)
at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:396)
at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:229)
at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:68)
at com.atlassian.jira.service.ServiceRunner.runService(ServiceRunner.java:62)
at com.atlassian.jira.service.ServiceRunner.runServiceId(ServiceRunner.java:44)
at com.atlassian.jira.service.ServiceRunner.runJob(ServiceRunner.java:32)
at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153)
at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118)
at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:443)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:438)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:462)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:390)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:285)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:282)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:65)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:59)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)
at java.lang.Thread.run(Thread.java:748)
System Details:
Java Version 1.8.0_162
Java Runtime Java(TM) SE Runtime Environment
System Encoding UTF-8
Operating System Linux 3.10.0-1127.8.2.el7.x86_64
OS Architecture amd64
Application Server Container Apache Tomcat/8.5.6
Database type postgres72
Database version 9.5.22
Database driver PostgreSQL Native Driver PostgreSQL 9.4.1212
Jira Version 7.9.2
Build Number 79002
Build Date Wed May 09 00:00:00 CEST 2018