Mail Blog
News, engineering insights, and privacy updates from the Aster team.
How our CDN relay works
Aster's Connection setting has two options: Direct and CDN Relay. Here's exactly what the relay changes about your network path, what it does not do, and why it never hides your IP from us.
How our decentralized storage works
There's a switch in your settings that takes your files out of our database entirely. Here's exactly what it does, where your encrypted files end up, and what we can still see, with nothing dressed up.
Password-protected, quantum-safe messages to anyone
How Aster lets you send encrypted, password-protected messages to Gmail and Outlook users using ML-KEM-768 post-quantum encryption, with no keys required on their end.
What does "end-to-end encrypted" really mean
An exact list of what Aster Mail encrypts on your device, what our servers can still see, and an honest explanation of why each piece of metadata exists.
How Aster encrypts your email
A complete, honest look at how Aster encrypts your email — from key derivation and post-quantum protection to the metadata we store in plaintext and why.
Why our storage costs so little
10 GB free and low upgrade prices. Here's the full picture on how we keep storage affordable - the infrastructure decisions, the trade-offs we made, and why this model holds up long-term.