DKIM adds a digital signature to outgoing messages, which lets receiving servers verify the message actually came from your organization. When a new domain is added, our system will enable DKIM by default. So please add the DKIM public key to your DNS host ASAP otherwise you may have trouble sending emails with your domain. DNS text record has the following format:
| Hostname | Type | Value |
|---|
| xyamail._domainkey | TXT | (content we returned) |
|---|
If you skip this step, your outgoing emails will not pass authentication checks and will be REJECTED by other mail services.