I own my own .net domain, I set up a 2018@{mydomain}.net and give it out. If the service ends up being worthwhile, I change the email address with the service to a more permanent email address.
When 2019 rolls around, I look at December's emails to see if I want to keep anybody, and delete the 2018@{mydomain}.net and add 2019@{mydomain}.net.
This does require me to get a .net domain ($13? / year) and support Protonmail with their "Plus" service level ($4/month). I would posit that if one is unwilling to spend $60 a year on secure email than it's just not a priority for you.
DB
Disposables are cheap, but not free.
I own my own .net domain, I set up a 2018@{mydomain}.net and give it out. If the service ends up being worthwhile, I change the email address with the service to a more permanent email address.
When 2019 rolls around, I look at December's emails to see if I want to keep anybody, and delete the 2018@{mydomain}.net and add 2019@{mydomain}.net.
This does require me to get a .net domain ($13? / year) and support Protonmail with their "Plus" service level ($4/month). I would posit that if one is unwilling to spend $60 a year on secure email than it's just not a priority for you.