[Email Routing] Update email-routing-dns-records.mdx

CUSTESC-49908

Author: ngayerie

src/content/docs/email-routing/troubleshooting/email-routing-dns-records.mdx

@@ -15,3 +15,8 @@ head:
 4. The next page will show you what kind of action is needed. For example, if you are missing DNS records, select **Add records and enable**.
 
 If there is a problem with your SPF records, refer to [Troubleshooting SPF records](/email-routing/troubleshooting/email-routing-spf-records/).
+
+:::note[Note:]
+If you're not using Email Routing but notice an Email Routing DNS record on your zone that you can't delete, you can use the [Disable Email Routing API call](/api/resources/email_routing/methods/disable/): it will remove any unexpected records.
+(For example, DKIM TXT records like `cf2024-1._domainkey.<hostname>`)
+:::