The cookie is set because of the GDPR Cookie Consent plugin and it is used to shop whether or not user has consented to the use of cookies. It does not keep any personal info. To troubleshoot this error you might want to setup SPF, DKIM, and DMARC for Zoho https://emailcampaign67766.blogdanica.com/26866458/5-tips-about-dmarc-error-you-can-use-today