I think this is a good idea. I can see many uses, but I believe the free tier is a bit restricted (32 emails per month).
You can set up a Catch Webhook [1] + Outgoing Email [2] automation in Zapier and it gives you 5 emails/day for free. Admittedly it is more complicated than using this, though.
[1] https://help.zapier.com/hc/en-us/articles/8496288690317-Trig...
[2] https://help.zapier.com/hc/en-us/articles/8496305915917-Send...