Add converted documents.
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Zhang Huangbin
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#
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# Syntax
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#
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# - Link: An [text](http://url.com/ "title")
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#
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#!/usr/bin/env bash
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# Author: Zhang Huangbin <zhb _at_ iredmail.org>
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# Purpose: Convert markdown articles to HTML files.
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# TODO
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# - describe the directory structure and how it works
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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></title>
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<link href="../css/markdown.css" rel="stylesheet"></head>
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</head>
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<body>
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<h3></h3>
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<p>This is most frequently asked questions.</p></body></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></title>
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<link href="../css/markdown.css" rel="stylesheet"></head>
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</head>
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<body>
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<h3></h3>
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<h1 id="amavisd-spamassassin-not-working-no-mail-header-x-spam-inserted">Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.</h1>
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<p>Amavisd has below setting in its config file by default:
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File: /etc/amavisd/amavisd.conf</p>
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<pre><code>$sa_tag_level_deflt = 2.0;
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</code></pre>
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<p>That means Amavisd will insert <code>X-Spam-Flag</code> and other <code>X-Spam-*</code> headers when email score >= 2.0. If you want to let Amavisd always insert these headers, you can set it to a low score, for example:</p>
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<pre><code>$sa_tag_level_deflt = -999;
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</code></pre>
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<p>Amavisd's main config file is different on different Linux/BSD distributions:</p>
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<ul>
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<li>Red Hat, CentOS, OpenBSD: <code>/etc/amavisd/amavisd.conf</code></li>
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<li>Debian, Ubuntu: <code>/etc/amavis/conf.d/50-user</code> (and other config files under <code>/etc/amavs/conf.d/</code>)</li>
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<li>FreeBSD: <code>/usr/local/etc/amavisd/amavisd.conf</code></li>
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</ul></body></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></title>
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<link href="../css/markdown.css" rel="stylesheet"></head>
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</head>
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<body>
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<h3></h3>
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<h1 id="how-to-enable-smtps-service-smtp-over-ssl-port-465">How to enable SMTPS service (SMTP over SSL, port 465)</h1>
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<h3 id="why-iredmail-doesnt-enable-smtps-smtp-over-ssl-by-default">Why iRedMail doesn't enable SMTPS (SMTP over SSL) by default</h3>
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<p>SMTPS is deprecated, so iRedMail disable it by default.
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Quote from wikipedia.org: http://en.wikipedia.org/wiki/SMTPS</p>
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<blockquote>
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<p>Originally, in early 1997, the Internet Assigned Numbers Authority registered 465 for SMTPS. By the end of 1998, this was revoked when STARTTLS has been specified. With STARTTLS, the same port can be used with or without TLS. SMTP was seen as particularly important, because clients of this protocol are often other mail servers, which can not know whether a server they wish to communicate with will have a separate port for TLS. The port 465 is now registered for Source-Specific Multicast audio and video.</p>
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</blockquote>
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<h3 id="why-enable-smtps-since-its-depreciated">Why enable SMTPS since it's depreciated</h3>
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<p>Unfortunately, there're some popular mail clients don't support submission (SMTP over STARTTLS, port 587), the famous one is Microsoft Outlook. Quote from wikipedia.org:</p>
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<blockquote>
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<p>Even in 2013, there are still services that continue to offer the deprecated SMTPS interface on port 465 in addition to (or instead of!) the RFC-compliant message submission interface on the port 587 defined by RFC 6409. Service providers that maintain port 465 do so because older Microsoft applications (including Entourage v10.0) do not support STARTTLS, and thus not the smtp-submission standard (ESMTPS on port 587). The only way for service providers to offer those clients an encrypted connection is to maintain port 465.</p>
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</blockquote>
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<h3 id="how-to-enable-smtps">How to enable SMTPS</h3>
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<p>To enable SMTPS, you should configure Postfix to listen on port 465 first, then open port 465 in iptables.</p>
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<p>Please find below lines in Postfix config file <code>/etc/postfix/master.cf</code> (Linux/OpenBSD) or <code>/usr/local/etc/postfix/master.cf</code> (FreeBSD):</p>
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<pre><code>#smtps inet n - n - - smtpd
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# -o smtpd_tls_wrappermode=yes
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# -o smtpd_sasl_auth_enable=yes
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# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
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# -o milter_macro_daemon_name=ORIGINATING
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</code></pre>
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<p>Uncomment first 4 lines, but leave the last one commented out (because iRedMail doesn't use Postfix milter at all):</p>
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<pre><code>smtps inet n - n - - smtpd
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-o smtpd_tls_wrappermode=yes
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-o smtpd_sasl_auth_enable=yes
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-o smtpd_client_restrictions=permit_sasl_authenticated,reject
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# -o milter_macro_daemon_name=ORIGINATING
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</code></pre>
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<p>Restart Postfix service to enable SMTPS.</p>
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<h3 id="open-port-465-in-iptables">Open port 465 in iptables</h3>
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<p>On RHEL/CentOS, please update iptables rule file <code>/etc/sysconfig/iptables</code>, add one rule (third line in below code) for port 465, then restart iptables service.</p>
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<pre><code># File: /etc/sysconfig/iptables
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-A INPUT -p tcp --dport 25 -j ACCEPT
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-A INPUT -p tcp --dport 587 -j ACCEPT
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-A INPUT -p tcp --dport 465 -j ACCEPT
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</code></pre>
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<p>On Debian/Ubuntu, if you use iptables rule file provided by iRedMail, please update <code>/etc/default/iptables</code>, add one rule (third line in below code) for port 465, then restart iptables service.</p>
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<pre><code>File: /etc/sysconfig/iptables
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-A INPUT -p tcp --dport 25 -j ACCEPT
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-A INPUT -p tcp --dport 587 -j ACCEPT
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-A INPUT -p tcp --dport 465 -j ACCEPT
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</code></pre>
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<p>On OpenBSD, please append service 'smtps' in <code>/etc/pf.conf</code>, parameter <code>mail_services=</code>:</p>
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<pre><code>File: /etc/pf.conf
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mail_services="{www, https, submission, imap, imaps, pop3, pop3s, ssh, smtps}"
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</code></pre>
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<p>Reload PF rule file:</p>
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<pre><code># pfctl -f /etc/pf.conf
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</code></pre></body></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></title>
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<link href="../css/markdown.css" rel="stylesheet"></head>
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</head>
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<body>
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<h3></h3>
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<h1 id="frequently-asked-questions-and-howto-documents"><a href="/Users/zhb/projects/docs/output/faq-howto/_summary.html">Frequently Asked Questions and Howto documents</a></h1>
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<h2 id="amavisd-spamassassin-not-working-no-mail-header-x-spam-inserted"><a href="/Users/zhb/projects/docs/output/faq-howto/amavisd_no_x-spam-headers.html"> Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.</a></h2>
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<h2 id="how-to-enable-smtps-service-smtp-over-ssl-port-465"><a href="/Users/zhb/projects/docs/output/faq-howto/how-to-enable-smtps-service.html"> How to enable SMTPS service (SMTP over SSL, port 465)</a></h2></body></html>
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