DKIM

When email is sent, it can be signed by the sending server. The DKIM DNS record contains the public key the corresponds to the signature used by the sending server. The recipient server will use that to verify the signature and determine if the email was sent by a server authorised by the domain.

If you are using Mailcast to send from your domain, you will need to add a DNS pointer to our DKIM key so we can sign emails we send on your behalf.