Privacy-first email client with post-quantum encryption and aliases
Sends and receives end-to-end encrypted email using OpenPGP plus post-quantum ML-KEM-768, with a unified inbox for IMAP/SMTP/POP3 and support for multiple aliases. Aster Mail, from Aster Privacy, targets privacy-conscious individuals and professionals who need encrypted communication and data sovereignty. The desktop client for Windows pairs encrypted metadata and tracker blocking with portable OpenPGP keys and free custom domain support, making secure mail management accessible across devices.
What does Aster Mail protect and how?
Aster Mail implements a zero-access architecture so only users can decrypt messages, using OpenPGP alongside post-quantum ML-KEM-768 to guard against future decryption threats. The app encrypts metadata such as subject lines, contacts, and folder structures, and blocks trackers and remote images to stop spy pixels from signalling reads. Portable OpenPGP keys can be exported for use in standard PGP clients.
Does it affect system performance or workflow?
The Windows client integrates a unified inbox that adds existing IMAP, SMTP, and POP3 accounts, which preserves typical desktop workflows while keeping encryption local. Because the service provides a dedicated desktop client, the encryption and key handling occur on-device rather than in a server relay. The Bridge tool enables third-party client support for users who want Outlook or Thunderbird compatibility, though that capability is tied to account tiers.
Is it safe to use and who should operate it?
The app stores servers in Germany and the codebase is open source under AGPL v3, allowing public audit and independent review; those facts support operational transparency. Account creation requires no phone number or recovery email, reducing personally identifying inputs. Security-conscious users who accept a recently launched service and who can manage key exports on their own gain the most practical value from the tool.
Clear choice for privacy-focused users who accept a young project
Aster Mail suits journalists and privacy-minded professionals who need device-side encryption, alias management, and custom domain support without supplying personal recovery data. The trade-off is the product's recent launch and attendant community scrutiny of a new codebase; users who prioritize long-established tooling may wait for ongoing audits. Recommended.
