In reply to Kevin N. Murphy.
Good luck with it. Use it for a while and you will see that’s it less reliable than send a pigeon.

Other thing is, what is the benefit of using all these services (paid) to handle just one contact form? I can imagine than even 3,5$/month server will handle emails more reliable and under your control.

Also Netlify can filter messages which are legit, bc. of spam filter what you can’t turn off.