SPF
To allow OfficeRnD to send emails on your behalf, you will have to add them to your SPF record. The SPF mechanism used by OfficeRnD is shown below.
include:spf.officernd.com
DKIM
OfficeRnd support DKIM and you will have to create a TXT record in your DNS with the value that they provide you.
For further configuration instructions please click on the button below.
Create a free OnDMARC account to test your configuration.