POP3 Comment Service not working

POP3 Comment Service not working.

log:

[service.services.mail.MailFetcherService] POP3 Comment Service[10010]: Error connecting to host 'xxx.xxx.com' as user 'xxx@xxx.com' via protocol 'pop3': javax.mail.AuthenticationFailedException: EOF on socket
javax.mail.AuthenticationFailedException: EOF on socket
at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:118)
at javax.mail.Service.connect(Service.java:233)
at com.atlassian.jira.service.services.mail.MailFetcherService.run(MailFetcherService.java:155)
at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:56)
at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:61)
at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)

JiraQuartzScheduler_Worker-0 ERROR [atlassian.jira.service.ServiceRunner] Error occured while executing the service [ Container: com.atlassian.jira.service.services.pop.PopService delay [60000ms]]
java.lang.NoSuchMethodError: com.atlassian.mail.MailUtils.isPartRelated(Ljavax/mail/Part;)Z