title: Java Mail Issue with Session.getInstance
body: <p>I am receiving the following exception when trying to use java mail;</p>
  
  <pre><code>java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger
      at javax.mail.Session.initLogger(Session.java:226)
      at javax.mail.Session.&lt;init&gt;(Session.java:210)
      at javax.mail.Session.getInstance(Session.java:247)
      at com.secondstory.mailsender.MailSender.createSmtpSession(MailSender.java:67)
      at com.secondstory.mailsender.MailSender.sendSimpleMessage(MailSender.java:38)
      at com.secondstory.mailsender.MailSender.generateLostPasswordEmail(MailSender.java:79)
      at com.secondstory.mailsender.MailSenderTest.shouldReturnTrueWithCredentialsSet(MailSenderTest.java:49)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
  Caused by: java.lang.ClassNotFoundException: com.sun.mail.util.MailLogger
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
      ... 30 more
  </code></pre>
  
  <p>After searching stack overflow extensively (maybe not extensively enough - lets see!) I have found that we need two jars inside our maven pom for this too work. The two dependancies I have are as follows;</p>
  
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;javax.mail&lt;/groupId&gt;
      &lt;artifactId&gt;javax.mail-api&lt;/artifactId&gt;
      &lt;version&gt;1.5.2&lt;/version&gt;
      &lt;scope&gt;runtime&lt;/scope&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;javax.activation&lt;/groupId&gt;
      &lt;artifactId&gt;activation&lt;/artifactId&gt;
      &lt;version&gt;1.1.1&lt;/version&gt;
  &lt;/dependency&gt; 
  </code></pre>
  
  <p>Something has changed but I am not entirely sure what it is - as this worked previously. The code i have written where this element fails is as follows;</p>
  
  <pre><code>private static Session createSmtpSession() {
      final Properties props = new Properties();
      props.setProperty("mail.host", "host");
      props.setProperty("mail.smtp.auth", "true");
      props.setProperty("mail.smtp.starttls.enable", "true");
      props.setProperty("mail.transport.protocol", "smtp");
      //props.setProperty("mail.debug", "true");
  
      return Session.getInstance(props, new javax.mail.Authenticator() {
                  protected PasswordAuthentication getPasswordAuthentication() {
                      return new PasswordAuthentication(
                              "username", "password");
                  }
              });
  }
  </code></pre>
  
  <p>Am I missing some config or should this work with the current setup that I have?</p>
  
  <p>Thanks</p>