Aster

Aster Mail is a free, open source, end-to-end encrypted email service. This is the official community server for users, contributors, and anyone interested in private communication. You'll find help with account setup, custom domains, OpenPGP, and our Bridge app, plus discussion about encryption, post-quantum cryptography, and the broader privacy space. The team hangs out here too, so it's the fastest way to get answers, report bugs, or push for features you want to see. Whether you're a long-time PGP user, someone who just wants email that respects your privacy, or a developer curious about our AGPL codebase, you're welcome here.