[Email Routing] Add note about multiple destinations (#19066)

---------

Signed-off-by: Jesse Brandeburg <[email protected]>
Co-authored-by: Pedro Sousa <[email protected]>

Author: jbrandeb

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

@@ -3,15 +3,10 @@ title: Enable Email Routing
 pcx_content_type: get-started
 sidebar:
   order: 1
-
 ---
 
 :::caution[Important]
-
-
 Enabling Email Routing adds the appropriate `MX` records to the DNS settings of your zone in order for the service to work. You can [change these `MX` records](/email-routing/setup/email-routing-dns-records/) at any time. However, depending on how you configure them, Email Routing might stop working.
-
-
 :::
 
 1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com/) and select your account and domain.
@@ -23,9 +18,13 @@ Enabling Email Routing adds the appropriate `MX` records to the DNS settings of
 7. Enter the custom email address you want to use (for example, `[email protected]`).
 8. In **Destination addresses**, enter the full email address you want your emails to be forwarded to — for example, `[email protected]`.
 
-:::note
-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[Notes]
+
+   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.
+
+   The current implementation of email forwarding 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.
@@ -36,9 +35,5 @@ If you have several destination addresses linked to the same custom email addres
 Email Routing is now enabled. You can add other custom addresses to your account.
 
 :::note
-
-
 When Email Routing is configured and running, no other email services can be active in the domain you are configuring. If there are other `MX` records already configured in DNS, Cloudflare will ask you if you wish to delete them. If you do not delete existing `MX` records, Email Routing will not be enabled.
-
-
 :::