To authorise NewZapp to send emails on behalf of your domain, add their mechanism to your SPF record. The SPF mechanism for NewZapp is:
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​include:_spf.newzapp.co.uk

Detailed steps can be found below.

To configure DKIM for NewZapp contact NewZapp customer support at [email protected] to get your unique signing information.
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To test your configuration for both SPF and DKIM is correctly configured, start your 14 day free trial with OnDMARC!