javamail - 使用javax，开发了一个邮件发送应用程序。在生产中出现以下错误。请指教。

javax.mail.MessagingException：无法连接到SMTP主机：xxxxxxxx port：xx; 嵌套异常是： javax.net.ssl.SSLException：java.lang.RuntimeException：无法生成DH密钥对 at com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:1706） at com.sun.mail.smtp.SMTPTransport.protocolConnect（SMTPTransport.java:525）在javax.mail.Service.connect（Service.java:291）在javax.mail.Service.connect（Service.java:172）在javax.mail.Service.connect（Service.java:121）在javax.mail.Transport.send0（Transport.java:190）在javax.mail.Transport.send（Transport.java:120）在com.loyauty.web.struts.action.user.CustomerSignUp.execute（CustomerSignUp.java:111） at sun.reflect.GeneratedMethodAccessor3375.invoke（Unknown Source） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）在com.opensymphony.xwork2.DefaultActionInvocation.invokeAction（DefaultActionInvocation.java:441）在com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly（DefaultActionInvocation.java:280）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:243） at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept（ConversionErrorInterceptor.java:122）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237） at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept（ParametersInterceptor.java:195）在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:87）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237） at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept（ParametersInterceptor.java:195）在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:87）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237） at org.apache.struts2.interceptor.MultiselectInterceptor.intercept（MultiselectInterceptor.java:75）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237） at org.apache.struts2.interceptor.CheckboxInterceptor.intercept（CheckboxInterceptor.java:94）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237）在com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept（PrepareInterceptor.java:138）在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:87）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237）在org.apache.struts2.interceptor.ServletConfigInterceptor.intercept（ServletConfigInterceptor.java:164）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237） at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept（ExceptionMappingInterceptor.java:176）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237）在com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept（I18nInterceptor.java:165）在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:237）在org.apache.struts2.impl.StrutsActionProxy.execute（StrutsActionProxy.java:52）在org.apache.struts2.dispatcher.Dispatcher.serviceAction（Dispatcher.java:488） at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction（ExecuteOperations.java:77） at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter（StrutsPrepareAndExecuteFilter.java:91）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在com.loyauty.web.filter.JsessionFilter.doFilter（JsessionFilter.java:72）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在com.loyauty.web.filter.LocaleFilter.doFilter（LocaleFilter.java:62）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在com.loyauty.web.filter.CharacterEncodingFilter.doFilter（CharacterEncodingFilter.java:60）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:225）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:169）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:472）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:168） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:98）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:407）在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:999） at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:565）在org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:309） at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1110） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:603）在java.lang.Thread.run（Thread.java:722）引起：javax.net.ssl.SSLException：java.lang.RuntimeException：无法生成DH密钥对 at sun.security.ssl.Alerts.getSSLException（Alerts.java:208）在sun.security.ssl.SSLSocketImpl.fatal（SSLSocketImpl.java:1868） at sun.security.ssl.SSLSocketImpl.fatal（SSLSocketImpl.java:1826） at sun.security.ssl.SSLSocketImpl.handleException（SSLSocketImpl.java:1809） at sun.security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1328） at sun.security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1305） at com.sun.mail.util.SocketFetcher.configureSSLSocket（SocketFetcher.java:503）在com.sun.mail.util.SocketFetcher.getSocket（SocketFetcher.java:234）在com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:1672） ......还有62个引起：java.lang.RuntimeException：无法生成DH密钥对在sun.security.ssl.DHCrypt。（DHCrypt.java:123） at sun.security.ssl.ClientHandshaker.serverKeyExchange（ClientHandshaker.java:618）在sun.security.ssl.ClientHandshaker.processMessage（ClientHandshaker.java:202） at sun.security.ssl.Handshaker.processLoop（Handshaker.java:868）在sun.security.ssl.Handshaker.process_record（Handshaker.java:804） at sun.security.ssl.SSLSocketImpl.readRecord（SSLSocketImpl.java:998） at sun.security.ssl.SSLSocketImpl.performInitialHandshake（SSLSocketImpl.java:1294） at sun.security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1321） ......还有66个引起：java.security.InvalidAlgorithmParameterException：Prime大小必须是64的倍数，并且只能是512到1024（含）在com.sun.crypto.provider.DHKeyPairGenerator.initialize（DHKeyPairGenerator.java:120） at java.security.KeyPairGenerator $ Delegate.initialize（KeyPairGenerator.java:658）在sun.security.ssl.DHCrypt。（DHCrypt.java:117）

使用javax，开发了一个邮件发送应用程序。在生产中出现以下错误。请指教。

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