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DKIM

From: http://wiki.qmailtoaster.com/index.php/How_to_Setup_DKIM_with_Qmail_Toaster

DKIM on QmailToaster

  1. yum install perl-XML-Simple perl-Mail-DKIM perl-XML-Parser

  2. wget https://raw.githubusercontent.com/qmtoaster/dkim/master/qmail-remote

  3. wget https://raw.githubusercontent.com/qmtoaster/dkim/master/signconf.xml

  4. mkdir /var/qmail/control/dkim

  5. mv signconf.xml /var/qmail/control/dkim/

  6. chown -R qmailr:qmail /var/qmail/control/dkim/

  7. dknewkey /var/qmail/control/dkim/global.key > /var/qmail/control/dkim/public.txt

  8. perl -pi -e 's/global.key._domainkey/dkim1/' /var/qmail/control/dkim/public.txt

  9. qmailctl stop

  10. mv /var/qmail/bin/qmail-remote /var/qmail/bin/qmail-remote.orig

  11. mv qmail-remote /var/qmail/bin

  12. chmod 777 /var/qmail/bin/qmail-remote

  13. chown root:qmail /var/qmail/bin/qmail-remote

  14. qmailctl start

  15. cat /var/qmail/control/dkim/public.txt

  16. Create a TXT record in DNS settings for the domain you want to set DKIM as shown in the output of step 15.

  17. Your DKIM setup is done.

  18. Just send test mail on any yahoo email id and check headers. If show error in headers then just wait to reflect DNS.

In order to test your settings, simply send an email to: check-auth@verifier.port25.com and/or check-auth2@verifier.port25.com with the suject of "test" (without the quotes) and "Just testing" in the body (also without quotes). It is best but not required to have a subject and body because this service will also show you how spamassassin rated your email.