Hi,   I am getting failure in PutEmail Processor in our organization's nifi server.The error states that "Could not convert socket to TLS:routing to failure: javax.mail.MessagingException: Could not convert socket to TLS: nested exception is: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake"   I routed the failure relation back to processor and after 30-40(randomly) or more retries it processes successfully.Though trying to figure out why its getting failure in first place. Attaching the log here. 2021-10-25 12:44:36,643 ERROR [Timer-Driven Process Thread-3] o.a.nifi.processors.standard.PutEmail PutEmail[id=bdc0872f-2860-12ce-c193-24605d5b6823] Failed to send email for StandardFlowFileRecord[uuid=844b4761-2a4c-439a-9f3d-5e6f06739c00,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1635165813775-357600, container=default, section=224], offset=3718, length=82370],offset=0,name=SampleFile.csv,size=82370]: Could not convert socket to TLS; routing to failure: javax.mail.MessagingException: Could not convert socket to TLS; nested exception is: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake javax.mail.MessagingException: Could not convert socket to TLS at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1907) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:666) at javax.mail.Service.connect(Service.java:317) at javax.mail.Service.connect(Service.java:176) at javax.mail.Service.connect(Service.java:125) at javax.mail.Transport.send0(Transport.java:194) at javax.mail.Transport.send(Transport.java:124) at org.apache.nifi.processors.standard.PutEmail.send(PutEmail.java:541) at org.apache.nifi.processors.standard.PutEmail.onTrigger(PutEmail.java:395) at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1174) at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213) at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117) at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1002) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397) at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549) at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:486) at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1902) ... 20 common frames omitted Caused by: java.io.EOFException: SSL peer shut down incorrectly at sun.security.ssl.InputRecord.read(InputRecord.java:505) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983) ... 26 common frames omitted   Any help would be appreciated.   https://community.cloudera.com/t5/Support-Questions/remote-host-closed-connection-during-handshake/m-p/328869    Thanks, Kamal ... View more