Germany
Posteo is a German, privacy-first alternative to Gmail and Outlook, run as an ad-free and sustainability-focused service. Calendar and contacts sync over open CalDAV and CardDAV standards, so your data stays portable rather than locked into one app.
At €1 a month it is arguably the cheapest serious privacy mailbox in Europe, which makes it an easy recommendation for personal use. The main trade-off is that it does not support custom domains, with extra storage and aliases sold separately.
