How can I stop my Zendesk emails from going into my customer's spam folder? Why do my sent emails go into the spam folders of our customers?
In many cases, your email is directed to your customer's spam folder because the customer's email system doesn't trust that the email is legitimate. To improve the chances of a successful delivery, use a combination of SPF, DKIM, and DMARC to verify the trustability of your outgoing emails. Zendesk must be included in the records when setting up SPF and DKIM in order to authorize sending from your Zendesk account. If you are encountering any errors during setup, see the article: How to fix the email error messages on forwarding, SPF, DNS, and TXT records?
If issues persist, ask your end users to contact their mail providers to find out specifically why their system marked it as spam. Include this information if you choose to contact Zendesk Customer Support for further assistance.