

If I understood correctly from Proton’s privacy policy, VPN does not log IP addresses but at least in some circumstances Mail does. This is from their privacy policy:
Due to limitations of the SMTP protocol, we have access to the following email metadata: sender and recipient email addresses, the IP address incoming messages originated from, attachment name, message subject, and message sent and received times.
One thing must be remembered: Even Proton must follow the law and rules.
I have never really liked that song but I still regularly hear it in my head. Since 1999.