JavaMail, SMTP error

I get the following error when I try to send an e-mail using the JavaMail API.
javax.mail.NoSuchProviderException: smtp
at javax.mail.Session.getService(Session.java:611)
at javax.mail.Session.getTransport(Session.java:541)
at javax.mail.Session.getTransport(Session.java:484)
at javax.mail.Session.getTransport(Session.java:464)
at javax.mail.Session.getTransport(Session.java:519)

I have configured the SMTP Host, user name, and password properly. I've also got the necessary jar files in my classpath.

Can you post your code?

/* Some SMTP servers require a username and password authentication before you can use their Server for Sending mail. This is most common with couple of ISP's who provide SMTP Address to Send Mail. This Program gives any example on how to do SMTP Authentication (User and Password verification) This is a free source code and is provided as it is without any warranties and it can be used in any your code for free. Author : Sudhir Ancha */ package com.kalzoom; import javax.mail.*; import javax.mail.internet.*; import java.util.*; import java.io.*; import com.kalzoom.hive.db.*; import org.apache.torque.util.Criteria; import org.apache.torque.util.BasePeer; import org.apache.jetspeed.modules.actions.portlets.JspPortletAction; import org.apache.jetspeed.portal.portlets.JspPortlet; import org.apache.jetspeed.modules.actions.hiveportlets.*; import org.apache.jetspeed.portal.Portlet; import org.apache.jetspeed.om.security.turbine.TurbineUser; import org.apache.jetspeed.om.security.turbine.TurbineUserPeer; import org.apache.turbine.util.RunData; import com.workingdogs.village.Record; import javax.servlet.http.*; import javax.servlet.*; /* To use this program, change values for the following three constants, SMTP_HOST_NAME -- Has your SMTP Host Name SMTP_AUTH_USER -- Has your SMTP Authentication UserName SMTP_AUTH_PWD -- Has your SMTP Authentication Password Next change values for fields emailMsgTxt -- Message Text for the Email emailSubjectTxt -- Subject for email emailFromAddress -- Email Address whose name will appears as "from" address Next change value for "emailList". This String array has List of all Email Addresses to Email Email needs to be sent to. Next to run the program, execute it as follows, SendMailUsingAuthentication authProg = new SendMailUsingAuthentication(); */ public class SendMailUsingAuthentication extends HttpServlet { private static final String SMTP_HOST_NAME = "xxx-xxx-msg.xxxxx.com"; private static final String SMTP_AUTH_USER = "user//mypwd"; private static final String SMTP_AUTH_PWD = "india123"; public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { String userName = request.getParameter("userName"); String email = request.getParameter("email"); String password=""; Criteria cr = new Criteria(); cr.addSelectColumn(TurbineUserPeer.LOGIN_NAME); cr.add(TurbineUserPeer.LOGIN_NAME, userName); List list = BasePeer.doSelect(cr); cr=null; if(list!=null && list.size()>0) { cr=new Criteria(); cr.add(TurbineUserPeer.LOGIN_NAME, userName); cr.addSelectColumn(TurbineUserPeer.PASSWORD_VALUE); List lst = BasePeer.doSelect(cr); if(lst!=null && lst.size()>0) { Record rec = (Record)lst.get(0); password = rec.getValue(1).asString(); } String[] recipient = {"kedar.dravid@gmail.com"}; String subject = "Your password"; String pwd = password; String from = "kedar411@yahoo.com"; postMail(recipient, subject, pwd, from); } else { String errMsg="User name does not exist."; request.setAttribute("errMsg", errMsg); } } catch(Exception e) { e.printStackTrace(); } } //private static final String emailMsgTxt = "Online Order Confirmation Message. Also include the Tracking Number."; //private static final String emailSubjectTxt = "Order Confirmation Subject"; //private static final String emailFromAddress = "kedar_dravid@javacommerce.com"; // Add List of Email address to who email needs to be sent to //private static final String[] emailList = { }; public void postMail( String recipients[ ], String subject, String message , String from) throws MessagingException { try { boolean debug = false; //Set the host smtp address Properties props = new Properties(); props.put("mail.smtp.host", SMTP_HOST_NAME); props.put("mail.smtp.auth", "true"); Authenticator auth = new SMTPAuthenticator(); Session session = Session.getDefaultInstance(props, auth); session.setDebug(debug); Message msg = new MimeMessage(session); InternetAddress addressFrom = new InternetAddress(from); msg.setFrom(addressFrom); Address[] addressTo = new InternetAddress[recipients.length]; for (int i = 0; i < recipients.length; i++) { addressTo[i] = new InternetAddress(recipients[i]); msg.addRecipient(Message.RecipientType.TO, addressTo[i]); } msg.setSubject(subject); msg.setContent(message, "text/plain"); /*Transport transport = session.getTransport(addressTo[0]); System.out.println(transport.toString());*/ Transport.send(msg); } catch(Exception e) { e.printStackTrace(); } } /** * SimpleAuthenticator is used to do simple authentication * when the SMTP server requires it. */ private class SMTPAuthenticator extends javax.mail.Authenticator { public PasswordAuthentication getPasswordAuthentication() { String username = SMTP_AUTH_USER; String password = SMTP_AUTH_PWD; return new PasswordAuthentication(username, password); } } }

Note that some parts of the code(the one where Criteria object is used) use the Torque persistence layer. You may ignore this part as this is used only for retrieving database records. Also, for security purposes, I have changed the SMTP host and user-name/password. Of course, I've configured these values correctly in the code thta I shall actually be using.
[ April 11, 2005: Message edited by: Kedar Dravid ]