Hi, my wife decided to create a new email for our newborn daughter which my wife would use to send updates to our relatives about what is going on in our daughter life.
My wife is using gmail, I do use proton. She has created a new gmail account but I have asked her to reconsider and to create a new account on proton privacy wise. What arguments would you use for my case?
Thanks.
You're broadcasting to family who will likely be using gmail, so what difference does it make? Google will get all the emails either way. Anyway, logical argumentation is completely useless in a personal situation like that.
If you want the address to be stable in the long term, you should probably use your own domain name instead of gmail or proton, if you're not already doing that. After that, it's possible to switch the hosting without changing the email address.
This is just called actually understanding your threat model and fully evaluating the controls available to you. Basic information security.
The most secure password policy in the world doesn't matter if your users just write them down on sticky notes on their desks. Security on your end doesn't matter if you're sending the data to an insecure destination.