The custom domain would act as another alias domain. You could have unlimited alias emails from it.
The point of using it would be for professional and financial purposes since a custom domain is unlikely to be blacklisted and you can have the domain be something like @lastname.com or @yourbusiness.com which is useful in a professional setting.
“catch-all” is a term / setting you can toggle in SimpleLogin. This allows you the option to use any example@yourcustomdomain email and it will automatically be created through SimpleLogin. This is handy if you want an alias but don’t have the time to manually create it.
For what I am suggesting, the catch-all might not actually be that useful now that I think about it.
No, you would just add the domain records as shown on the SimpleLogin “Add a Custom Domain” page.
In summary you would have
- 1 email provider (Proton) - for friends and family
- 1 alias provider (SimpleLogin) - alias emails for all subscriptions and services that do not need to be tied to your identity
- 1 custom domain - for alias’ that already know your identity such as business relationships and banks
This way you can manage all your emails through SimpleLogin and can easily turn off and re-create an alias that ends up in a data breach.