Did not get you properly? If you mean automating or scheduling email for a future date/time and auto-responding incomming emails, Gmail already have these features
This is for sending a message in case something happens to you and you're not able to send anything yourself anymore for whatever reason.
Hence the term "dead man's switch"
This is for sending a message in case something happens to you and you're not able to send anything yourself anymore for whatever reason.
Hence the term "dead man's switch"