mailbox.org is a respected, privacy-focussed German mail provider who's been around since almost the beginning. According to their site, they're providing servi

mailbox.org is a respected, privacy-focussed German mail provider who's been around since almost the beginning. According to their site, they're providing services to Wikimedia and many other NGOs. Though their business pricing is a bit steep compared to a run-of-the-mill mail space you get for your domain from the DNS registrar.