Update enable-email-routing.mdx

Add a note about multiple destination addresses.

Signed-off-by: Jesse Brandeburg <[email protected]>

Author: jbrandeb

src/content/docs/email-routing/get-started/enable-email-routing.mdx

@@ -27,6 +27,10 @@ Enabling Email Routing adds the appropriate `MX` records to the DNS settings of
 If you have several destination addresses linked to the same custom email address (rule), Email Routing will only process the most recent rule. To avoid this, do not link several destination addresses to the same custom address.
 :::
 
+:::note
+The current implementation of email fowarding only supports a single destination address per custom address. To forward a custom address to multiple destinations you must create a workers script to redirect the email to each destination. All the destinations used in the Workers script must be already validated.
+:::
+
 9. Select **Save**.
 10. Cloudflare will send a verification email to the address provided in the **Destination address** field. You must verify your email address before being able to proceed.
 11. In the verification email Cloudflare sent you, select **Verify email address** > **Go to Email Routing** to activate Email Routing.