Batch file giving error when run it manually or by Jenkins

Question

I am getting error when run batch file through Jenkins or manually by double click on it, Error is :

[[TestNGClassFinder]] Unable to read methods on class BulkMail.Send_Bulk_Mail - unable to resolve class reference javax/mail/MessagingException Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetPublicMethods(Class.java:2902) at java.lang.Class.getMethods(Class.java:1615) at org.testng.internal.TestNGClassFinder.(TestNGClassFinder.java:59) at org.testng.TestRunner.initMethods(TestRunner.java:409) at org.testng.TestRunner.init(TestRunner.java:235) at org.testng.TestRunner.init(TestRunner.java:205) at org.testng.TestRunner.(TestRunner.java:153) at org.testng.SuiteRunner$DefaultTestRunnerFactory.newTestRunner(SuiteRunner.java:522) at org.testng.SuiteRunner.init(SuiteRunner.java:157) at org.testng.SuiteRunner.(SuiteRunner.java:111) at org.testng.TestNG.createSuiteRunner(TestNG.java:1299) at org.testng.TestNG.createSuiteRunners(TestNG.java:1286) at org.testng.TestNG.runSuitesLocally(TestNG.java:1140) at org.testng.TestNG.run(TestNG.java:1057) at org.testng.TestNG.privateMain(TestNG.java:1364) at org.testng.TestNG.main(TestNG.java:1333) Caused by: java.lang.ClassNotFoundException: javax.mail.MessagingException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 18 more Build step 'Execute Windows batch command' marked build as failure Finished: FAILURE

Batch file Code :

java -cp bin;lib/* org.testng.TestNG testng.xml

TestNG XML Code :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite">
  <test name="Test">
    <classes>
      <class name="BulkMail.Send_Bulk_Mail"/> 
    </classes>
  </test> <!-- Test -->
</suite> <!-- Suite -->

I tried almost every solution available on internet and SO , But still same error. Not sure what I am missing.