Connections
- TLS 1.3 to every mail server; the app cannot fall back to an unencrypted connection.
- A warning if a server's certificate changes unexpectedly.
- Server names looked up over encrypted DNS, and optional routing through Tor.
Security
Security you can check
No app can promise to be unbreakable. Mailie Pro uses well-known, verifiable protections and is honest about what each one does.
Storage
- An encrypted database (SQLCipher, AES-256) for everything the app keeps.
- Keys held in the hardware-backed Android Keystore.
- An optional app lock with your fingerprint or face, and screenshot blocking.
End-to-end encryption
- OpenPGP and S/MIME, to send and read encrypted and signed mail.
- Automatic key discovery through Web Key Directory and Autocrypt.
- Always free: you can always decrypt mail you have received.
Fraud warnings
- Phishing and scam checks on every message, on your phone.
- Warnings about look-alike sender domains and changed bank details.
- A check before you send. All warnings are advice and never act for you.
Report a vulnerability
If you find a security problem in the app or this website, please write to us before disclosing it publicly. We will not take legal action against research done in good faith.