<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<header>
<p class="title entry-title">Copy/pasting a blog post just to make
you aware of it, in case there are email delivery problems...</p>
<h1 class="title entry-title">Spam blocklist SORBS has been shut
down, update Anti-Spam settings</h1>
</header>
<section class="entry">
<p>The spam blocklist SORBS has been shut down. By default Zimbra
uses SORBS via SpamAssasin, but also many Zimbra Administrators
have set-up SORBS as part of Postfix MTA restrictions. Monitor
the Zimbra MTA logging in <em>/var/log/zimbra.log </em>and
make changes to your configuration to make sure email continues
to be delivered properly.</p>
<h2>Postfix reject_rbl_client</h2>
<p>Check Zimbra’s MTA blocklist configuration by running the
following command as the OS user <em>zimbra</em>:</p>
<pre>zmprov gcf zimbraMtaRestriction</pre>
<p><br>
</p>
<p>In the output of the command see if a line is present that
contains sorbs such as <em>dnsbl.sorbs.net</em> and if so
remove it by running for example:</p>
<p
data-pm-slice="1 1 ["orderedList",{"start":1},"listItem",{}]">zmprov
mcf -zimbraMtaRestriction “reject_rbl_client dnsbl.sorbs.net”<br>
zmmtactl restart</p>
<h2>SpamAssassin</h2>
<p>A future update of SpamAssassin in Zimbra will remove SORBS
meanwhile since SORBS is on many places in SpamAssassin, one way
to disable it is by adding the following configuration to your <em>/opt/zimbra/data/spamassassin/localrules/local.cf</em>
file.</p>
<pre>dns_query_restriction deny sorbs.net</pre>
<p><br>
</p>
<p>Then as the OS user <em>zimbra</em> run the commands:</p>
<pre>zmmtactl restart && zmamavisdctl restart</pre>
<p><br>
</p>
<p><strong>Please note that the SpamAssassin steps have not been
validated by our QA team yet, so keep an eye out for updates
on this blog post at blog.zimbra.com.</strong></p>
<h2>Further reading</h2>
<p>An official announcement can not be found on the SORBS website,
but we can see it has been removed from SpamAssassin in:</p>
<ul>
<li><a
href="https://github.com/search?q=repo%3Aapache%2Fspamassassin+sorbs&type=commits"
target="_blank" rel="noopener">https://github.com/search?q=repo%3Aapache%2Fspamassassin+sorbs&type=commits</a></li>
</ul>
</section>
<p></p>
</body>
</html>