mailet thats splits email

[Norman Maurer]

Hi,

i wrote a mailet thats split the email in single emails per recipient.
But sometimes i get this error for example:



We were unable to deliver the attached message because of an error in
the mail server.

Message details:
  Subject: FAILED: AS29562
  Sent date: Fri Mar 10 06:51:48 CET 2006
  MAIL FROM: null
  RCPT TO: [EMAIL PROTECTED]
  From: RIPE Database Administration <[EMAIL PROTECTED]> 
  To: [EMAIL PROTECTED] 
  Size (in bytes): 2044


In the deadletter table is nothing usefull insert.. 

Anyone can give me a hint whats the problem ?

I attached the mailet.

bye



package org.apache.james.transport.mailets;

import org.apache.mailet.GenericMailet;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;

/**
 * Split the email for each recipient and pass it to a processor so we can process it later for each recip.
 * This make it possible to use diffrent settings for each recip.
 * 
 * Set the follow headers:
 * X-Domain: domain.de
 * X-User: [EMAIL PROTECTED]
 * 
 * <br><br>
 * 
 * Sample Configuration:
 * <br><br>
 * &lt;mailet match="All" class="SplitEmail"&gt;
 * &lt;processor&gt;sender&lt;/processor&gt;
 * &lt;/mailet&gt;
 * <br><br>
 * @author  Norman Maurer <[EMAIL PROTECTED]>
 */

public class SplitEmail extends GenericMailet
{

    protected String     domain         = null;

    protected String     user           = null;

    protected String     excubatorState = "sender";

    private final String HEADER_USER    = "X-User";

    private final String HEADER_DOMAIN  = "X-Domain";

    public void init() throws MessagingException
    {
        String excubatorState = getInitParameter("processor");

        if (excubatorState == null || excubatorState.equals(""))
        {
            excubatorState = "sender";
        }

    }

    /**
     * split the email
     *
     * @param mail the mail being processed
     *
     * @throws MessagingException if an error occurs while splitting the mail
     */
    public void service(Mail mail) throws MessagingException
    {
        Collection recipients = mail.getRecipients();

        for (Iterator i = recipients.iterator(); i.hasNext();)
        {
            Mail newMail = mail;
            MimeMessage message = newMail.getMessage();
            MailAddress recipient = (MailAddress) i.next();

            MailAddress sender = newMail.getSender();

            user = recipient.toString().toLowerCase();
            domain = recipient.getHost().toString().toLowerCase();

            /*
             * Set the right user for later using
             */
            message.setHeader(HEADER_USER, user);
            message.setHeader(HEADER_DOMAIN, domain);
            message.saveChanges();

            try
            {
                getMailetContext().sendMail(sender, Arrays.asList(new MailAddress[] { recipient }), message, excubatorState);

                log("sender: " + sender + " | " + "recipient: " + user);
            }
            catch (MessagingException ex)
            {
                log("Error while splitting mail.", ex);
            }
        }

        /*
         * drop the orginal mail 
         */
        mail.setState(Mail.GHOST);
    }

    /**
     * Return a string describing this mailet.
     *
     * @return a string describing this mailet
     */
    public String getMailetInfo()
    {
        return "SplitEmail Mailet";
    }
}

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