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&nbsp;&nbsp;//&nbsp;&nbsp;<a href="./index.html">Document Index</a></div><h1 id="major-open-source-softwares-used-in-iredmail">Major open source softwares used in iRedMail</h1>
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<div class="toc">
<ul>
<li><a href="#major-open-source-softwares-used-in-iredmail">Major open source softwares used in iRedMail</a><ul>
<li><a href="#used-components">Used Components</a></li>
<li><a href="#the-big-picture">The Big Picture</a></li>
<li><a href="#mail-flow-of-inbound-emails">Mail Flow of Inbound Emails</a></li>
<li><a href="#mail-flow-of-outbound-emails">Mail Flow of Outbound Emails</a></li>
<li><a href="#see-also">See also</a></li>
</ul>
</li>
</ul>
</div>
<h2 id="used-components">Used Components</h2>
<table>
<thead>
<tr>
<th>Name</th>
<th>Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="http://www.postfix.org">Postfix</a></td>
<td>Mail Transfer Agent (MTA)</td>
</tr>
<tr>
<td><a href="http://www.dovecot.org">Dovecot</a></td>
<td>POP3, IMAP and Managesieve server</td>
</tr>
<tr>
<td><a href="http://httpd.apache.org">Apache</a>, <a href="http://nginx.org">Nginx</a></td>
<td>Web server</td>
</tr>
<tr>
<td><a href="http://www.openldap.org">OpenLDAP</a>, <a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man8/ldapd.8?query=ldapd&amp;arch=i386">ldapd(8)</a></td>
<td>LDAP server, used for storing mail accounts (optional)</td>
</tr>
<tr>
<td><a href="http://www.mysql.com">MySQL</a>, <a href="https://mariadb.org">MariaDB</a>, <a href="http://www.postgresql.org">PostgreSQL</a></td>
<td>SQL server used to store application data. Could be used to store mail accounts too.</td>
</tr>
<tr>
<td><a href="http://www.amavis.org">Amavisd-new</a></td>
<td>Interface between Postfix and SpamAssassin, ClamAV. it calls SpamAssassin and ClamAV for content-based spam/virus scanning</td>
</tr>
<tr>
<td><a href="http://spamassassin.apache.org">SpamAssassin</a></td>
<td>Content-based spam scanner</td>
</tr>
<tr>
<td><a href="http://www.clamav.net/">ClamAV</a></td>
<td>Virus scanner</td>
</tr>
<tr>
<td><a href="http://roundcube.net">Roundcube</a></td>
<td>Webmail (PHP)</td>
</tr>
<tr>
<td><a href="http://sogo.nu">SOGo Groupware</a></td>
<td>A groupware which provides calendar (CalDAV), contact (CardDAV), tasks and ActiveSync services</td>
</tr>
<tr>
<td><a href="http://www.fail2ban.org">Fail2ban</a></td>
<td>Scans log files and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc</td>
</tr>
<tr>
<td><a href="http://www.awstats.org">Awstats</a></td>
<td>Apache and Postfix log analyzer</td>
</tr>
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<tr>
<td><a href="https://bitbucket.org/zhb/iredapd/">iRedAPD</a></td>
<td>A postfix policy server developed by iRedMail team</td>
</tr>
<tr>
<td><strike><a href="http://www.policyd.org">Cluebringer</a></strike></td>
<td><strike>A postfix policy server. Deprecated since iRedMail-0.9.3.</strike></td>
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</tr>
</tbody>
</table>
<h2 id="the-big-picture">The Big Picture</h2>
<p><img alt="" src="./images/big.picture.png" /></p>
<h2 id="mail-flow-of-inbound-emails">Mail Flow of Inbound Emails</h2>
<p><img alt="" src="./images/flow.inbound.png" /></p>
<h2 id="mail-flow-of-outbound-emails">Mail Flow of Outbound Emails</h2>
<p><img alt="" src="./images/flow.outbound.png" /></p>
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<h2 id="see-also">See also</h2>
<ul>
<li><a href="./file.locations.html">Locations of configuration and log files of major components</a></li>
<li><a href="./network.ports.html">Which network ports are open by iRedMail</a></li>
</ul><p style="text-align: center; color: grey;">All documents are available in <a href="https://bitbucket.org/zhb/iredmail-docs/src">BitBucket repository</a>, and published under <a href="http://creativecommons.org/licenses/by-nd/3.0/us/" target="_blank">Creative Commons</a> license. You can <a href="https://bitbucket.org/zhb/iredmail-docs/get/tip.tar.bz2">download the latest version</a> for offline reading. If you found something wrong, please do <a href="http://www.iredmail.org/contact.html">contact us</a> to fix it.<script>
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