chore: correct the email domains documentation (#1941)

## Description

Update the documentation for email domains

apps/documentation/pages/users/email-domains.mdx

@@ -5,15 +5,14 @@ import { Callout, Steps } from 'nextra/components';
 Email Domains allow you to send emails to recipients from your own domain instead of the default Documenso email address.
 
 <Callout type="info">
-  **Platform and Enterprise Only**: Email Domains is only available to Platform and Enterprise
-  customers.
+  **Enterprise Only**: Email Domains is only available to Enterprise customers and custom plans
 </Callout>
 
 ## Creating Email Domains
 
 Before setting up email domains, ensure you have:
 
-- A Platform or Enterprise subscription
+- An Enterprise subscription
 - Access to your domain's DNS settings
 - Access to your Documenso organisation as an admin or manager
 

packages/lib/types/subscription.ts

@@ -134,7 +134,7 @@ export const internalClaims: InternalClaims = {
       unlimitedDocuments: true,
       allowCustomBranding: true,
       hidePoweredBy: true,
-      emailDomains: true,
+      emailDomains: false,
       embedAuthoring: false,
       embedAuthoringWhiteLabel: true,
       embedSigning: false,