58 lines
3.6 KiB
HTML
58 lines
3.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>Performance tuning</title>
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<link rel="stylesheet" type="text/css" href="./css/markdown.css" />
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</head>
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<body>
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<div id="navigation">
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<a href="https://www.iredmail.org" target="_blank">
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<img alt="iRedMail web site"
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src="./images/logo-iredmail.png"
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style="vertical-align: middle; height: 30px;"
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/>
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<span>iRedMail</span>
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</a>
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// <a href="./index.html">Document Index</a></div><div class="admonition note">
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<p class="admonition-title">This tutorial is available in other languages. <a href="https://github.com/iredmail/docs">Help translate more</a></p>
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<p><a href="./performance.tuning-it_IT.html">Italiano</a> / <a href="./performance.tuning-zh_CN.html">简体中文</a> /</p>
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</div>
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<h1 id="performance-tuning">Performance tuning</h1>
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<div class="toc">
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<ul>
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<li><a href="#performance-tuning">Performance tuning</a><ul>
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<li><a href="#setup-a-dns-server-in-lan-or-localhost-to-cache-dns-queries">Setup a DNS server in LAN or localhost to cache DNS queries</a></li>
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<li><a href="#enable-postscreen-service-to-help-reduce-spam">Enable postscreen service to help reduce spam</a></li>
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<li><a href="#update-amavisd-postfix-config-files-to-process-more-emails-concurrently">Update Amavisd + Postfix config files to process more emails concurrently</a></li>
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</ul>
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</li>
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</ul>
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</div>
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<p>If you're running a busy mail server (many inbound/outbound emails every day),
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you can follow below suggestions for better performance.</p>
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<h3 id="setup-a-dns-server-in-lan-or-localhost-to-cache-dns-queries">Setup a DNS server in LAN or localhost to cache DNS queries</h3>
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<p>Mail services <strong>heavily</strong> rely on DNS service and perform many many DNS queries,
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a cache DNS server in LAN or localhost helps <strong>A LOT</strong>:</p>
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<ul>
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<li>It speeds up DNS queries. This helps a lot to speed up mail flow.</li>
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<li>It reduces DNS queries to DNSBL servers, so that you can continue using their
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excellent service without exceeding the max query limit.</li>
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</ul>
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<h3 id="enable-postscreen-service-to-help-reduce-spam">Enable postscreen service to help reduce spam</h3>
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<ul>
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<li><a href="./enable.postscreen.html">Enable postscreen service</a></li>
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</ul>
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<p>If you don't want to use postscreen service, you can <a href="./enable.dnsbl.html">enable DNSBL service</a>
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instead, it helps a lot too. Although both <code>postscreen</code> and pure DNSBL services
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uses the same DNSBL servers, but <code>postscreen</code> offers additional solutions to
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reduce spam, so postscreen is better.</p>
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<p>postscreen and DNSBL service help catch a lot spam before putting the spams
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in local mail queue, so they save much system resource.</p>
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<h3 id="update-amavisd-postfix-config-files-to-process-more-emails-concurrently">Update Amavisd + Postfix config files to process more emails concurrently</h3>
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<ul>
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<li><a href="./concurrent.processing.html">Process more emails concurrently</a></li>
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</ul><div class="footer">
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<p style="text-align: center; color: grey;">All documents are available in <a href="https://github.com/iredmail/docs/">GitHub 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://github.com/iredmail/docs/archive/master.zip">download the latest version</a> for offline reading. If you found something wrong, please do <a href="https://www.iredmail.org/contact.html">contact us</a> to fix it.</p>
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</div></body></html> |