docs: add email provider section (#10459)

docs/content/docs/concepts/email.mdx

@@ -5,6 +5,14 @@ description: Learn how to set up email verification, require verified emails for
 
 Email is a key part of Better Auth, required for all users regardless of their authentication method. Better Auth provides email and password authentication out of the box, and a lot of utilities to help you manage email verification, password reset, and more.
 
+## Bring Your Own Email Provider
+
+Better Auth works with any transactional email provider, giving you full control over how your authentication emails are delivered. To send emails, start by setting up your preferred provider.
+
+For example, you might consider the following email providers:
+
+* [Resend](https://resend.com/better-auth)
+
 ## Email Verification
 
 Email verification is a security feature that ensures users provide a valid email address. It helps prevent spam and abuse by confirming that the email address belongs to the user. In this guide, you'll get a walk through of how to implement token based email verification in your app.