Sending an email with JSP

Below is a simple JSP page to send an email using a datasource. Each user has a preconfigured datasource with the name "smtp_username" where username is your webspace name. Using datasources is preferable to making a standard SMTP connection as if we make any changes to our mail configuration you will not need to update your application.

Note: Do not include mail.jar or activation.jar files in your applications classpath ('WEB-INF/lib') as these are already in Tomcat's classpath by default and you may receive class cast exceptions.

<%@ page language="java" import="javax.naming.*,java.io.*,javax.mail.*,javax.mail.internet.*"%>
<%
try{
	out.println("Sending an email");
	Context initCtx = new InitialContext();
	javax.mail.Session mailSession = (javax.mail.Session) initCtx.lookup("java:/comp/env/mail/smtp_username");
	Transport trans = mailSession.getTransport("smtp");
	trans.connect(mailSession.getProperty("mail.smtp.host"), 
	        	mailSession.getProperty("mail.smtp.user"), 
	        	mailSession.getProperty("mail.smtp.password")
        		);
	MimeMessage m = new MimeMessage(mailSession);
	m.setFrom(new InternetAddress("username@devisland.net"));
	Address[] toAddr = new InternetAddress[] {
	  new InternetAddress("user@test.org")
	};
	m.setRecipients(javax.mail.Message.RecipientType.TO, toAddr );
	m.setSubject("JavaMail Test");
	m.setSentDate(new java.util.Date());
	m.setContent("Test", "text/plain");
	trans.sendMessage(m,m.getAllRecipients());
	trans.close();
}
catch(Exception e){
	out.println(e.getMessage());
	e.printStackTrace();
}
%>