The purpose of the signature is to provide details about one self and the company... It seems like you modeled everything as a forum, which is quite annoying. When we receive email notifikations about tickets we are not taken to the support tool but just to a thread. Forum concept is also annoying because a ticket system should work like email where you answer ON TOP of the current request (otherwise you cant see what you are answering)... And signature is extremely important... as a commercial tool
Hello, to set signature you can customise your notification email template here
https://[your project alias].userecho.com/settings/email/templates/base/
It's possible to set text, also context with user agent name and other params is available.
After setup, all notifications will have required signature.