title: Domain Keys, DKIM and Sendmail
body: <p>When I am using DomainKeys and DKIM together on a linux system, do I run both of them on the same port?</p>
  
  <p>DomainKeys:<br>
  <em>/usr/bin/dk-filter -l -p inet:<strong>8891</strong>@localhost -d example.com -s /var/db/ domainkeys/default.key.pem -S default</em></p>
  
  <p>DKIM:<br>
  <em>/usr/bin/dkim-filter -l -p inet:<strong>8891</strong>@localhost -c simple -d example.com -k /var/db/dkim/mail.key.pem -s mail -S rsa-sha256 -u dkim -m MSA</em></p>
  
  <p>Or do I do something like this:</p>
  
  <p>DomainKeys:<br>
  <em>/usr/bin/dk-filter -l -p inet:<strong>8892</strong>@localhost -d example.com -s /var/db/ domainkeys/mail1.key.pem -S default</em></p>
  
  <p>DKIM:<br>
  <em>/usr/bin/dkim-filter -l -p inet:<strong>8891</strong>@localhost -c simple -d example.com -k /var/db/dkim/mail2.key.pem -s mail -S rsa-sha256 -u dkim -m MSA</em></p>
  
  <p>Just wondering since information about DomainKeys and DKIM tell you to run them on the same port:<br>
  <a href="http://www.elandsys.com/resources/sendmail/domainkeys.html" rel="nofollow noreferrer">http://www.elandsys.com/resources/sendmail/domainkeys.html</a><br>
  <a href="http://www.elandsys.com/resources/sendmail/dkim.html" rel="nofollow noreferrer">http://www.elandsys.com/resources/sendmail/dkim.html</a><br></p>
  
  <p>I want to run both of them together, is this a bad idea?</p>