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19
20
21
22 package org.apache.james.transport.mailets;
23
24 import org.apache.mailet.base.GenericMailet;
25 import org.apache.mailet.Mail;
26 import org.apache.mailet.MailAddress;
27 import org.apache.mailet.MailetContext;
28
29 import javax.mail.MessagingException;
30 import java.util.Collection;
31 import java.util.Iterator;
32 import java.util.Vector;
33
34 /**
35 * Rewrites recipient addresses to make sure email for the postmaster is
36 * always handled. This mailet is silently inserted at the top of the root
37 * spool processor. All recipients mapped to postmaster@<servernames> are
38 * changed to the postmaster account as specified in the server conf.
39 *
40 */
41 public class PostmasterAlias extends GenericMailet {
42
43 /**
44 * Make sure that a message that is addressed to a postmaster alias is always
45 * sent to the postmaster address, regardless of delivery to other recipients.
46 *
47 * @param mail the mail to process
48 *
49 * @throws MessagingException if an error is encountered while modifying the message
50 */
51 public void service(Mail mail) throws MessagingException {
52 Collection recipients = mail.getRecipients();
53 Collection recipientsToRemove = null;
54 MailetContext mailetContext = getMailetContext();
55 boolean postmasterAddressed = false;
56
57 for (Iterator i = recipients.iterator(); i.hasNext(); ) {
58 MailAddress addr = (MailAddress)i.next();
59 if (addr.getUser().equalsIgnoreCase("postmaster") &&
60 mailetContext.isLocalServer(addr.getHost())) {
61 //Should remove this address... we want to replace it with
62 // the server's postmaster address
63 if (recipientsToRemove == null) {
64 recipientsToRemove = new Vector();
65 }
66 recipientsToRemove.add(addr);
67 //Flag this as having found the postmaster
68 postmasterAddressed = true;
69 }
70 }
71 if (postmasterAddressed) {
72 recipients.removeAll(recipientsToRemove);
73 recipients.add(getMailetContext().getPostmaster());
74 }
75 }
76
77 /**
78 * Return a string describing this mailet.
79 *
80 * @return a string describing this mailet
81 */
82 public String getMailetInfo() {
83 return "Postmaster aliasing mailet";
84 }
85 }