To authorize Communicator to send emails on your behalf you will have to include it in your SPF record. The SPF record mechanism used for Communicator is shown below.

include:spf.communicatoremail.com

For more information on SPF set up for Communicator please click on the button below.

For information on to set up DKIM please click on the button below.

Create a free OnDMARC account to test your configuration.