当我尝试发送测试电子邮件时，我已经使用smtp.google.com的JNDI位置完成了传出电子邮件服务器的配置，
com.atlassian.mail.MailException: javax.naming.NamingException: Unexpected exception resolving reference [Root exception is java.lang.NullPointerException]
at com.atlassian.mail.server.impl.SMTPMailServerImpl.sendWithMessageId(SMTPMailServerImpl.java:221)
at com.atlassian.mail.server.impl.SMTPMailServerImpl.send(SMTPMailServerImpl.java:162)
at com.atlassian.jira.plugins.mail.webwork.SendTestMail.doExecute(SendTestMail.java:107)
at webwork.action.ActionSupport.execute(ActionSupport.java:165)
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:63)
at webwork.interceptor.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:39)
at webwork.interceptor.NestedInterceptorChain.proceed(NestedInterceptorChain.java:31)
at webwork.interceptor.ChainedInterceptor.intercept(ChainedInterceptor.java:16)
at webwork.interceptor.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:35)
at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:225)