58 lines
3.0 KiB
HTML
58 lines
3.0 KiB
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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 href="./css/markdown.css" rel="stylesheet"></head>
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</head>
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<body>
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<div id="navigation">
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<a href="http://www.iredmail.org" target="_blank">iRedMail web site</a>
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// <a href="./index.html">Document Index</a>
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</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 like to send from different IP Addresses for different domains, follow the 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 need <code>sender_dependent_default_transport_maps</code> is available in Postfix-2.7 and 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 <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: I use domain 'example.com' for testing, it will use transport 'sample-smtp' - see 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. Note: you must replace our sample IP address <code>172.16.244.159</code> with your IP address.</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 just as before.</p><p style="text-align: center; color: grey;">Document published under a <a href="http://creativecommons.org/licenses/by-nd/3.0/us/" target="_blank">CC BY-ND 3.0</a> license. 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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