Version： 2.63

 Win10 X86

Jenkin version： 2.121.2

Sending email for trigger: Always
ERROR: Could not send email as a part of the post-build publishers.
java.lang.NullPointerException
at hudson.plugins.emailext.ExtendedEmailPublisherDescriptor.createSession(ExtendedEmailPublisherDescriptor.java:244)
at hudson.plugins.emailext.ExtendedEmailPublisher.createMail(ExtendedEmailPublisher.java:726)
at hudson.plugins.emailext.ExtendedEmailPublisher.sendMail(ExtendedEmailPublisher.java:451)
at hudson.plugins.emailext.ExtendedEmailPublisher._perform(ExtendedEmailPublisher.java:441)
at hudson.plugins.emailext.ExtendedEmailPublisher.perform(ExtendedEmailPublisher.java:349)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:744)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:690)
at hudson.model.Build$BuildExecution.cleanUp(Build.java:196)
at hudson.model.Run.execute(Run.java:1845)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
Some error occured trying to send the email...check the Jenkins log
Finished: SUCCESS