Here is a quick demo of the GSmart AutoReply App showing how to auto-reply to emails even at 2:am
In the GSmart AutoReply App, you can setup rules to reply to emails received during a certain time period (for example, 7pm to 8am) You can further target the emails ( who sent the email, keywords in the email body).
This makes it possible to do email automation to a level that was not possible before.
Try AutoReply here:
Read the full documentation:
GSmart AutoReply Docs