To configure your domain hosted on Pipe Ten with SPF, you will have to add them to your SPF record. The SPF mechanism used by Pipe Ten is shown below.
mx include:spf.pipeten.co.uk include:spf.purelymx.com
For more information please click the button below.
You can configure your Pipe Ten domain with DKIM via your Control Panel / Mail Info / Mail Manager as described here:
Create a free OnDMARC account to test your configuration.