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+<h1>Email Forwarding</h1>
+<p>
+Emails to @debian.org addresses now go through a LDAP distributed email system.
+This system uses the forwarding field in the LDAP directory to route mail
+without passing it through a users .forward file on a single host.
+Multiple machines participate in the forwarding to provide redundancy.
+<p>
+Each forwarders inspects the LDAP database
+to see if foo@debian.org has forwarding set to an address, if so the <i>envelope
+to address</i> is rewritten and the message redirected to the new address.
+Otherwise the message is relayed to master.debian.org for processing by the
+users .forward files. If email forwarding is setup then .forward files are
+<b>NOT</b> considered. Extension addresses (foo-lists) are always routed
+directly to master for processing.
+<p>
+All machines also use the forwarding attribute as a default destination for
+email. If the user has a home directory and no .forward file the mail is
+forwarded rather than delivered to /var/spool/mail. This makes sure cron
+reports, bug responses and other unexpected emails are not misplaced.
+<p>
+If you set the forwarding address to be a specific Debian machine and do
+not create a forward file then that machine will spool the mail to
+/var/spool/mail instead of creating a mail loop.
+<p>
+The email forwarding can be easily reconfigured using GnuPG:
+<pre>
+echo "emailforward: foo@bar.com" | gpg --clearsign | mail change@db.debian.org
+</pre>
+or by visiting <a href="https://db.debian.org/login.html">db.debian.org</a>
+<p>
+You can test the email routing by using the command <tt>/usr/sbin/exim -bt
+foo@debian.org</tt>
+<h2>procmail</h2>
+If you use procmail for your main mailbox, PLEASE, erase your .forward
+file and put a .procmailrc in its place instead. This feature has been
+supported on debian.org machines for a good while now, and will continue to be
+supported. .procmailrc files won't be synchronised to all hosts in
+the LDAP directory.
+<p>
+The correct way to invoke procmail for extension addresses is "|/usr/bin/procmail [options]"
+Ignore the IFS=".." stuff in the procmail man page.
+<h2>MailBox formats</h2>
+Email can be saved to mailboxes or maildirs by using the correct lines in a
+.forward file:
+<p>
+Mailbox format files "/debian/home/foo/Mbox"
+<br>Maildir format files "/debian/home/foo/MDir/"
+<p>
+To deliver to /var/spool/mail/foo use a construct like '|/usr/bin/procmail
+-m /dev/null'. Putting the mailbox path will not work. You must use
+absolute paths for mailboxes, qmail-like ./ paths are not supported by
+Exim.
+<p>
+Also, 'Exim Filter' files are deliberately turned off.
+<hr noshade width="100%" size="1">
+Back to the <a href="http://www.debian.org/">Debian Project homepage</a>.
+<hr noshade width="100%" size="1">
+<small>
+You can contact us at
+<a href="mailto:admin@db.debian.org">admin@db.debian.org</a>.
+</small>
+<p>
+<p><small>
+Last Modified: Mon, May 9 18:13:06 UTC 2005
+ <br>
+ Copyright © 1997-2005
+ <a href="http://www.spi-inc.org/">SPI</a>; See <a href="http://www.debian.org/license" rel="copyright">license terms</a><br>
+ Debian is a registered trademark of Software in the Public Interest, Inc.
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