Using Instabug's workflow automation rules, you can set up automatic replies to incoming bug reports based on criteria you set. You can navigate to the rules page through the Settings menu, choose Rules, and create a new rule.
For example would be to send automatic replies to users that report bugs from an older app version. In this scenario, you can set the "For" and "When" section to be when a new bug is reported, the "If" section to be any app version less than the current one, and the "Then" section to be "Reply to user".
You can find more use cases and additional details about rules here.