Good way to suppress email disclosure of admin URL?

[artifacts]

When a customer sends a problem report by email, the support person gets notified, and the notification includes the WHMCS admin URL, which will typically include a hidden directory name (e.g.: https://www.example.com/whmcs/admin.123-secret-1bc).

 

Now when the support person replies to this by email, and if his mail client includes the original email as quoted text, the customer receives the reply with the WHMCS admin URL still showing in the quoted text. (Observed when using Alpine or Google Gmail.) So a hostile customer is now one step closer to breaching WHMCS security.

 

Being the support person in this case, I will not remember to edit out the admin URL manually. Is there a good way of automatically preventing this disclosure? I'm thinking maybe I should set up a mail alias that feeds into a script, which will edit out the URL and then feed the email to WHMCS. This might be error-prone, though. Looking for something easier.

 

A.