Iredmail DKIM setup for Multiple domain

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Iredmail supports multiple domains and the important part in email delivery is to secure the email transactions and protect your email domain from SPAM.

in order to setup your dkim for a new domain do the following.

Login to your server and use root access.

Step1: Create your DKIM key for new domain by using the following command.

Step2: Set Ownership for the Key.

Step3: Set Permission for your New Key.

chmod 0400 /var/lib/dkim/newdomain.com.pem

Step4: Restart Amavis service for the changes to take effect.

Step5: View Your new Key and DKIM Record.

UseYour the new key for your DNS records.

you can also verify the changes using thirdparty tools like MXtools

https://mxtoolbox.com/spf.aspx