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Failed to receive messages from Email server: [javax.mail.AuthenticationFailedException - EOF on socket

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i am using Consumepop3 processer in nifi.when i receive any message then its showing eroor:-

org.apache.nifi.processor.exception.ProcessException: Failed to receive messages from Email server: [javax.mail.AuthenticationFailedException - EOF on socket at org.apache.nifi.processors.email.AbstractEmailProcessor.fillMessageQueueIfNecessary(AbstractEmailProcessor.java:328) ~[nifi-email-processors-1.1.2.jar:1.1.2] at org.apache.nifi.processors.email.AbstractEmailProcessor.receiveMessage(AbstractEmailProcessor.java:387) ~[nifi-email-processors-1.1.2.jar:1.1.2] at org.apache.nifi.processors.email.AbstractEmailProcessor.onTrigger(AbstractEmailProcessor.java:195) ~[nifi-email-processors-1.1.2.jar:1.1.2] at org.apache.nifi.processors.email.ConsumePOP3.onTrigger(ConsumePOP3.java:31) ~[nifi-email-processors-1.1.2.jar:1.1.2] at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) ~[nifi-api-1.1.2.jar:1.1.2] at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1099) [nifi-framework-core-1.1.2.jar:1.1.2] at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136) [nifi-framework-core-1.1.2.jar:1.1.2] at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47) [nifi-framework-core-1.1.2.jar:1.1.2] at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132) [nifi-framework-core-1.1.2.jar:1.1.2] at java.util.concurrent.Executors$RunnableAdapFutureTask.java:308) [na:1.8.0_121] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_121] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121] Caused by: javax.mail.AuthenticationFailedException: EOF on socket at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:213) ~[mail-1.4.7.jar:1.4.7] at javax.mail.Service.connect(Service.java:366) ~[mail-1.4.7.jar:1.4.7] at javax.mail.Service.connect(Service.java:246) ~[mail-1.4.7.jar:1.4.7] at javax.mail.Service.connect(Service.java:195) ~[mail-1.4.7.jar:1.4.7] at org.springframework.integration.mail.AbstractMailReceiver.connectStoreIfNecessary(AbstractMailReceiver.java:286) ~[spring-integration-mail-4.3.0.RELEASE.jar:4.3.0.RELEASE] at org.springframework.integration.mail.AbstractMailReceiver.openFolder(AbstractMailReceiver.java:293) ~[spring-integration-mail-4.3.0.RELEASE.jar:4.3.0.RELEASE] at org.springframework.integration.mail.AbstractMailReceiver.receive(AbstractMailReceiver.java:319) ~[spring-integration-mail-4.3.0.RELEASE.jar:4.3.0.RELEASE] at org.apache.nifi.processors.email.AbstractEmailProcessor.fillMessageQueueIfNecessary(AbstractEmailProcessor.java:323) ~[nifi-email-processors-1.1.2.jar:1.1.2] ... 15 common frames omitted

Could you please suggest me how to solve this error?

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