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copied!<p>I tried to run you code for myself to see what would happen. First, I made sure I had <code>mail.jar</code> file available on the classpath. Second, I did a bit of necessary changes in order to be able to run the code without getting authentication errors. i.e, instead of:</p> <pre><code>props.put("mail.smtp.host", "smtp.exchangemails.com"); </code></pre> <p>I used:</p> <pre><code>props.put("mail.smtp.host", "smtp.gmail.com"); </code></pre> <p>and obviously, I had to provide my own username and password for this different host. </p> <p>You are right; The application worked well when was executed standalone. However, when I moved it to a <code>JBoss AS 7.0.0</code>, I encountered two different problems.</p> <p>Initially, I faced this error:</p> <pre><code>at javax.mail.Session.getDefaultInstance(Session.java:320) [mail-1.4.4.jar:1.4.4] at test.TestJavaMail.process(TestJavaMail.java:42) [classes:] </code></pre> <p>which after some googling and finding the solution given <a href="http://www.java.net/node/697528" rel="nofollow">here</a>, I could get rid of this error. i.e, I replaced this line:</p> <pre><code>Session session = Session.getDefaultInstance(props, auth); </code></pre> <p>with:</p> <pre><code>Session session = Session.getInstance(props, auth); </code></pre> <p>Then, I tried running the application again. This time, I received the below error:</p> <pre><code>java.lang.NoClassDefFoundError: javax/net/ssl/SSLPeerUnverifiedException com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900) com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638) javax.mail.Service.connect(Service.java:295) test.TestJavaMail.process(TestJavaMail.java:63) </code></pre> <p>I Googled the above error and found <a href="https://issues.jboss.org/browse/AS7-1278" rel="nofollow">there was a bug with my used JBoss version</a>. So, I moved the application to a later <code>JBoss</code> version which was <code>JBoss AS 7.1.1</code> and I succeeded. The servlet successfully sent an email to the destination I had provided for it. </p> <p>I hope this investigation will be helpful to you and to any visitor who is struggling with a similar problem.</p>

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