62 lines
3.2 KiB
HTML
62 lines
3.2 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>Send out email from specified IP address</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><h1 id="send-out-email-from-specified-ip-address">Send out email from specified IP address</h1>
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<p>If you have multiple IP addresses available on your iRedMail server, and would
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like to send from different IP Addresses for different domains, follow the
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steps below.</p>
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<h3 id="requirement">Requirement</h3>
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<p>This can only be set up on Postfix version <code>>=2.7.x</code>, because the parameter we
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need <code>sender_dependent_default_transport_maps</code> is available in Postfix-2.7 and
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later releases.</p>
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<p>To check your Postfix version run:</p>
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<pre><code># postconf mail_version
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</code></pre>
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<p>Which would return something like: <code>mail_version = 2.10.3</code></p>
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<h3 id="steps">Steps</h3>
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<ul>
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<li>Add Postfix setting <code>sender_dependent_default_transport_maps</code> to the end of
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<code>/etc/postfix/main.cf</code> like below:</li>
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</ul>
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<pre><code>sender_dependent_default_transport_maps = pcre:/etc/postfix/sdd_transport.pcre
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</code></pre>
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<ul>
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<li>Add file <code>/etc/postfix/sdd_transport.pcre</code> with below content. NOTE: we use
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domain <code>example.com</code> for example, it will use transport <code>sample-smtp</code> - see
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examples.</li>
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</ul>
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<pre><code>/@example\.com$/ sample-smtp:
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</code></pre>
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<ul>
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<li>Create new outgoing SMTP transports in <code>/etc/postfix/master.cf</code> like below.
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Note: you must replace our sample IP address <code>172.16.244.159</code> with your IP
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address. If you want to use IPv6 address, please use <code>smtp_bind_address6</code>
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instead of <code>smtp_bind_address</code> below.</li>
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</ul>
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<pre><code>sample-smtp unix - - n - - smtp
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-o smtp_bind_address=172.16.244.159
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# -o smtp_helo_name=example.com
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# -o syslog_name=postfix-example-com
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</code></pre>
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<p>Option <code>smtp_helo_name</code> and <code>syslog_name</code> are optional.</p>
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<p>After this restart the Postfix service to apply your changes:</p>
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<pre><code># /etc/init.d/postfix restart
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</code></pre>
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<p>Note: any unmatched domains will continue using the server's primary IP address
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just as before.</p><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> |