How to install own chatmail and notification proxy?

[9er]

But this information is actually needed only after successful authorization. Maybe client can get this info after login success?
Please see this:

Capabilities in Server Hello message

You’re thinking right. I don’t like to show those specific capabilities to the whole world. I want it to looks like perfectly usual mail server. These strings are in server’s config file, it’s trivial to comment them out. My question is on the consequences of such configuration. What will I miss, using DC clients with server not showing those caps? Maybe clients can get info on server functionality after they logged in?