Privacy minded email alias service that tells me an email has been forwarded without any additional information?

Hey I have been trying to find a solution to this one for a while. Proton has an option where for example you can be notified via the recovery email that you have mail or not. My memory is that it doesn’t even show the proton username, certainly no message content. I have a rarely used email address that I use that can be set up to forward incoming mail. However all of the email alias services including simplelogin seem to forward on the full mail and not have any option to send a custom mail devoid of information when mail is forwarded to that address. For clarity I’m looking to have a setup where emails to foo@mail.com forward to alias@alias.com and my main mailbox me@protonmail.com just gets a message from alias@alias.com with a Generic “Message received” body that would be set by me, with no reference to foo@mail.com or the body of the forwarded message. Does anyone know any aliasing services that would support this?