Email Authentication for Mail Hosting
Why does Zoho's email sending server does not have DomainKeys and DKIM? These two email authentication methods are used by more than 80% of free email providers and should be implemented by Zoho for safe and sure email delivery.
Would also like to know what hostnames are used by Zoho to send emails other than sender1.zohomail.com, so I can add them in my domain's SPF records.