将电子邮件发送到以下服务器失败（apache commons-Java）

我正试图在Java程序中使用ApacheCommons发送一封HTML电子邮件。这是我的代码：

HtmlEmail email = new HtmlEmail();
email.setHostName("mail.axc.nl");
email.setSslSmtpPort("465");
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSLOnConnect(true);
email.addTo(emailadr, name);
email.setFrom("noreply@smartfix.me", "SmartFix");
email.setSubject("Subject");
email.setHtmlMsg("here goes my message");
email.send();

现在，这就像我的桌面电脑（运行Windows8）上的一个魅力。现在，在我的服务器（运行Windows server 2012）上，它失败了。它总是会出现以下异常：

Sending the email to the following server failed: mail.axc.nl:465

我检查了我的证件十几次，都没问题。我不明白为什么这在我的服务器上不起作用，而在我的桌面上它却工作得很好：S

更新：似乎每次编译和运行程序时都会发生错误。当我的代码在netbeans中运行时，它运行得很好。这是堆栈跟踪：

C:\inetpub\tracking>java.exe -jar SmartFixGUI.jar
SmartFix Tracking Terminal - loaded successfully.
Currently tracking null
71QJD73I3I is a smartphone.
Currently tracking 71QJD73I3I
71QJD73I3I is a smartphone.
org.apache.commons.mail.EmailException: Sending the email to the following serve
r failed : mail.axc.nl:465
        at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1410)
        at org.apache.commons.mail.Email.send(Email.java:1437)
        at smartfixgui.trackingNumber.sendMail(trackingNumber.java:378)
        at smartfixgui.infoViewer.jButton2ActionPerformed(infoViewer.java:262)
        at smartfixgui.infoViewer.access$200(infoViewer.java:19)
        at smartfixgui.infoViewer$3.actionPerformed(infoViewer.java:149)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$200(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
        at java.awt.EventQueue$4.run(Unknown Source)
        at java.awt.EventQueue$4.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: javax.mail.MessagingException: IOException while sending message;
  nested exception is:
        javax.activation.UnsupportedDataTypeException: no object DCH for MIME ty
pe multipart/mixed;
        boundary="----=_Part_0_1999183509.1389954279345"
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1182)
        at javax.mail.Transport.send0(Transport.java:254)
        at javax.mail.Transport.send(Transport.java:124)
        at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1400)
        ... 41 more
Caused by: javax.activation.UnsupportedDataTypeException: no object DCH for MIME
 type multipart/mixed;
        boundary="----=_Part_0_1999183509.1389954279345"
        at javax.activation.ObjectDataContentHandler.writeTo(Unknown Source)
        at javax.activation.DataHandler.writeTo(Unknown Source)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1593)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1839)
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1134)
        ... 44 more

更新2:我的build.xml中似乎有问题。。。当运行jar的“解包”版本（我的代码在jar中，apache/javax在lib文件夹中的单独jar中）时，一切正常。当运行“组合发行版”（apache、javax和我的代码打包在一个jar中）时，它会出错。

有人在my build.xml中发现错误吗？我已经使用它很长时间了，从来没有遇到过任何问题：/

<?xml version="1.0" encoding="UTF-8"?>
<project name="SmartFixGUI" default="default" basedir=".">
    <description>Builds, tests, and runs the project SmartFixGUI.</description>
    <import file="nbproject/build-impl.xml"/>
<target name="-post-jar">
    <jar jarfile="dist/Combined-dist.jar">
    <zipfileset src="${dist.jar}" excludes="META-INF/*" />
    <zipfileset src="lib/commons-email-1.3.2.jar" excludes="META-INF/*" />
    <zipfileset src="lib/javax.mail.jar" excludes="META-INF/*" />
    <manifest>
        <attribute name="Main-Class" value="smartfixgui.main"/>
    </manifest>
  </jar>
</target>
</project>

构建、测试和运行项目SmartFixGUI。

多亏了杰拉尔德·施耐德，我找到了一个解决方案

在谷歌上进一步搜索DCH异常，我发现在创建电子邮件对象之前添加此代码可以修复它

MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
        CommandMap.setDefaultCommandMap(mc);

---

您的服务器能否连接到

mail.axc.nl

？是否有防火墙？stacktrace中可能有更多有意义的信息（如连接被拒绝）（尤其是在最低的异常中）？出于某种原因，它似乎根本无法从编译的jar文件中工作。它在我的桌面和服务器上获取异常。但当我在netbeans中运行它时，一切都很正常。我马上就要添加堆栈跟踪了。我想这是您的问题：

unsupportedatatypeexception:no object DCH for MIME type multipart/mixed

由于防病毒软件阻止端口25，也可能发生此问题。检查您的防病毒日志文件是否有以下条目：“2017年10月7日12:54:12 PM被端口阻止规则C:\PROGRAM files\JAVA\JRE1.8.0_131\BIN\JAVAW.EXE防病毒标准保护：防止邮件群发蠕虫发送邮件0:0:0:0:ffff:aa2:cdcc:25