Sending, Bounce, and Tracking Domains

Create and add a sending domain for recipients to identify who their emails are from. Your sending domain will be shown in an email's 'from' header. Set up the DNS records for your domain to enable recipients' mail servers to authenticate your email messages. 

You can add, get a list of tracking domains, mark a tracking domain as default, and also delete it.

Note: It is mandatory that you configure DKIM for your sending domains. This maximizes email deliverability and avoids your emails from being marked as spam.