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<title>Alex Schroeder: Email</title>
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<pubDate>Mon, 20 May 2013 10:14:53 GMT</pubDate>
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<title>Alex Schroeder: Email</title>
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<title>Email and DNS</title>
<link>http://alexschroeder.ch/wiki/2011-02-21_Email_and_DNS</link>
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<description>&lt;p&gt;Too bad I understand so little about server administration. Maybe one of you out there can help? I have the following mail setup:&lt;/p&gt;&lt;p&gt;• mail to alex@emacswiki.org is resent to alex@gnu.org via some LDAP rule. At the time I saved the following info by the admins in a note to myself:&lt;/p&gt;&lt;pre class="real"&gt;dn: mail=alex@emacswiki.org,ou=Mail,dc=thinkmo,dc=de
objectClass: mailAlias
objectClass: mail
mail: alex@emacswiki.org
mailDrop: alex@gnu.org&lt;/pre&gt;&lt;p&gt;• mail to alex@gnu is forwarded to kensanata@gmail.com via an alias. This looks as follows:&lt;/p&gt;&lt;pre class="real"&gt;alex@fencepost:~$ grep kensanata /srv/data/com/mailer/aliases
alex: kensanata@gmail.com&lt;/pre&gt;&lt;p&gt;• I read my kensanata@gmail.com mail via the Gmail website or via IMAP on the iPad.&lt;/p&gt;&lt;p&gt;The &lt;b&gt;problem&lt;/b&gt; is a mail I recently got from one of the admins. It said that an email to alex@emacswiki.org was forwarded to alex@gnu.org and resulted in mail.thinkmo.de (the mail server for the account &amp;#x201c;alex@emacswiki.org&amp;#x201d;) being added to &lt;a class="url http outside" href="http://psbl.surriel.com"&gt;a black list&lt;/a&gt;. Obviously the admins don&amp;#x2019;t like this.&lt;/p&gt;&lt;p&gt;They require me to take one of the following three steps:&lt;/p&gt;&lt;ul&gt;&lt;li&gt;make sure 83.137.100.41 is on the whitelist of the MTA (I guess that&amp;#x2019;s the IP number for mail.thinkmo.de)&lt;/li&gt;&lt;li&gt;stop forwarding to alex@gnu.org&lt;/li&gt;&lt;li&gt;or wrap the mail in a different way&lt;/li&gt;&lt;/ul&gt;&lt;p&gt;The only part I understand is &amp;#x201c;stop forwarding&amp;#x201d;. This is difficult because of two reasons:&lt;/p&gt;&lt;ol&gt;&lt;li&gt;the email address gets a lot of spam, therefore it needs to be filtered by Gmail – my spam folder contains over 2000 spam emails for the last 30 days&lt;/li&gt;&lt;li&gt;the email address gets so much spam that having Gmail fetch emails for alex@emacswiki.de from the mail.thinkmo.de server didn&amp;#x2019;t work – the list of unfetched email just kept on growing&lt;/li&gt;&lt;/ol&gt;&lt;p&gt;I don&amp;#x2019;t know how to whitelist the mail server, and I don&amp;#x2019;t know where to do it. And I don&amp;#x2019;t know how the mail server is wrapping the emails it forwards to alex@gnu.org, and I don&amp;#x2019;t know how to change it.&lt;/p&gt;&lt;p&gt;What should I do?&lt;/p&gt;&lt;p&gt;I get my DNS services from Gandi, and they offer &amp;#x201c;email redirection&amp;#x201d; – but I&amp;#x2019;m assuming that it has no effect if I provide an external DNS (ns1.thinkmo.de and ns6.gandi.net – I have no idea how I determined these two many years ago).&lt;/p&gt;&lt;p&gt;Any suggestion on what I should write my admins?&lt;/p&gt;&lt;p&gt;Tags: &lt;a class="outside tag" title="Tag" rel="tag" href="http://alexschroeder.ch/wiki?action=tag;id=Email"&gt;Email&lt;/a&gt; &lt;a class="feed tag" title="Feed for this tag" rel="feed" href="http://alexschroeder.ch/wiki/feed/full/Email"&gt;&lt;img src="http://alexschroeder.ch/pics/rss.png" alt="RSS" /&gt;&lt;/a&gt; &lt;a class="outside tag" title="Tag" rel="tag" href="http://alexschroeder.ch/wiki?action=tag;id=DNS"&gt;DNS&lt;/a&gt; &lt;a class="feed tag" title="Feed for this tag" rel="feed" href="http://alexschroeder.ch/wiki/feed/full/DNS"&gt;&lt;img src="http://alexschroeder.ch/pics/rss.png" alt="RSS" /&gt;&lt;/a&gt; &lt;a class="outside tag" title="Tag" rel="tag" href="http://alexschroeder.ch/wiki?action=tag;id=admin"&gt;admin&lt;/a&gt; &lt;a class="feed tag" title="Feed for this tag" rel="feed" href="http://alexschroeder.ch/wiki/feed/full/admin"&gt;&lt;img src="http://alexschroeder.ch/pics/rss.png" alt="RSS" /&gt;&lt;/a&gt; &lt;a class="outside tag" title="Tag" rel="tag" href="http://alexschroeder.ch/wiki?action=tag;id=Spam"&gt;Spam&lt;/a&gt; &lt;a class="feed tag" title="Feed for this tag" rel="feed" href="http://alexschroeder.ch/wiki/feed/full/Spam"&gt;&lt;img src="http://alexschroeder.ch/pics/rss.png" alt="RSS" /&gt;&lt;/a&gt;&lt;/p&gt;</description>
<pubDate>Tue, 22 Feb 2011 00:08:32 GMT</pubDate>
<comments>http://alexschroeder.ch/wiki/Comments_on_2011-02-21_Email_and_DNS</comments>
<dc:contributor>AlexSchroeder</dc:contributor>
<wiki:status>new</wiki:status>
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<wiki:history>http://alexschroeder.ch/wiki?action=history;id=2011-02-21_Email_and_DNS</wiki:history>
<wiki:diff>http://alexschroeder.ch/wiki?action=browse;diff=1;id=2011-02-21_Email_and_DNS</wiki:diff>
<category>Email</category>
<category>DNS</category>
<category>admin</category>
<category>Spam</category>
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