There is something to like there. A reminder to people about the response expectations of this email.

It also scares me a little bit. Isn’t this the implied social contract of emails? Hasn’t it always been, but especially now-days with many different more immediate communication methods where the social contract is less defined?

I also wonder who the message is for. If they are talking to a stranger, it seems unnecessary. Strangers don’t owe you anything and everyone on both sides of this email knew that. Are the a friend? Weirdly formal for a friend. Are the a co-worker? That seems the most likely, but shouldn’t expectations about communication be such an important work concept that it shouldn’t be the responsibility of an email signature to take that up?