You can create a new addresses for your brand in the Omnidesk application at Admin settings. At your mail provider you should forward mail to your omnidesk primary email address: email@example.com. After you've configured this you will receive the new emails in Omnidesk.
In order to allow Omnidesk to send mail for your domain (for instance: brand.com) we need to add a SPF record to your domains DNS. You can use the following data:
This option helps e-mail providers like for instance gmail and hotmail to authenticate the sender of the email.