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  1. POSmtp error 451 Temporary local - please try later on Cpanel Server
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    <p>I have a Cpanel Server.</p> <p>It send emails correctly expect from 1 domain which hosted on the server , so when I try to send email from that domain using roundcube or Horde I got the errror</p> <pre><code>SMTP Error (451): Failed to add recipient "recipient@exmple.com" (Temporary local problem - please try later). </code></pre> <p>does anyone know why and how to fix this?</p> <hr> <p>I found the porblem:</p> <p>After reviewing the file /var/log/exim_mainlog using</p> <pre><code>tail -f /var/log/exim_mainlog </code></pre> <p>I noticed that the error was:</p> <pre><code>2013-05-29 20:04:28 SMTP connection from [127.0.0.1]:36797 (TCP/IP connection count = 1) 2013-05-29 20:04:28 lowest numbered MX record points to local host: domain.com (while verifying &lt;user@domain.com&gt; from host localhost.localdomain (domain.com) [127.0.0.1]:36797) 2013-05-29 20:04:28 H=localhost.localdomain (domain.com) [127.0.0.1]:36797 sender verify defer for &lt;user@domain.com&gt;: lowest numbered MX record points to local host 2013-05-29 20:04:28 H=localhost.localdomain (domain.com) [127.0.0.1]:36797 F=&lt;user@domain.com&gt; A=dovecot_login:narena temporarily rejected RCPT &lt;recipient@exmple.com&gt;: Could not complete sender verify 2013-05-29 20:04:28 SMTP connection from localhost.localdomain (domain.com) [127.0.0.1]:36797 closed by QUIT </code></pre> <p>so the main problem was:</p> <pre><code>lowest numbered MX record points to local host </code></pre> <p>after couple of search I found the soluation in <a href="http://forums.cpanel.net/f5/lowest-numbered-mx-record-points-local-host-73563.html" rel="nofollow">http://forums.cpanel.net/f5/lowest-numbered-mx-record-points-local-host-73563.html</a></p> <p>which was to:</p> <p>login to WHM and go to Main >> DNS Functions >> Edit MX Entry for the domain</p> <p>set MX priority to 0 for the related domain and save.</p>
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