Intake Email for self-hosted instances (#317)

Author: danciaclara

docs/intake/intake-email.mdx

@@ -20,6 +20,10 @@ With Intake Emails, you get a dedicated email address where people can send requ
 ## How Intake emails work
 When someone sends an email to your project's dedicated address, our system automatically converts it into a work item in your Intake section. The email subject becomes the work item title, while the body becomes the description. Any attachments are preserved and added to the work item for easy reference.
 
+:::danger[Self-hosted Plane instance]
+If you're running a self-hosted instance of Plane, you'll need to set up a few extra configurations to get Intake Email working. Check out the [setup guide](https://developers.plane.so/self-hosting/govern/configure-dns-email-service) first before diving into the steps on this page.
+:::
+
 ## Enable Intake Email
 
 ![enable-intake-email](https://media.docs.plane.so/intake/enable-intake-email.webp#center)