Hi @Summ1 ...
As far as I know, the request for auto-replies in the Canvas Inbox is still a request here in the Community. The space for submitting ideas used to be called "Feature Ideas", but it has now been renamed "Ideas and Themes". This thread is what I would direct you to now:
Underneath the heading of "Referenced Ideas", you'll see one of the items listed is what I had linked to (above) back in 2019:
[Inbox] Auto-reply for Canvas messages
Here are a couple recent blog posts on the new Ideas and Themes space and how it works:
I know this might not be the solution you were looking for, but I hope it will help to answer your question in some way.
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.