By definition an email server is not under your control, so the question of whether or not it runs FOSS is a bit moot and in any case impossible to verify.
In terms of privacy-respecting email hosting, Proton, Posteo, and Mailbox all spring to mind.
Exactly this. Services and software are not the same thing, you’re asking for a service recommendation and it can’t be open-source software because it’s not software.
By definition an email server is not under your control, so the question of whether or not it runs FOSS is a bit moot and in any case impossible to verify.
In terms of privacy-respecting email hosting, Proton, Posteo, and Mailbox all spring to mind.
dont forget tuta
https://tuta.com/
Exactly this. Services and software are not the same thing, you’re asking for a service recommendation and it can’t be open-source software because it’s not software.