Unlike Mail

Messages between Unlike Mail users are sealed on the sending device; provider, session and recovery limits follow.

Scroll to specifications

Custody boundaries

Who seals, opens and carries the message.
Specification	What it does	Boundary	State
Sender device	Seals mail to another Unlike Mail user before delivery.	Ordinary mail is outside this scope.	Confirmed
Recipient device	Opens sealed mail with local key material.	The shared secret is never on the wire or on our server.	Confirmed
Public-key directory	Looks up the recipient key by email before sealing.	Trust on first use; fingerprint verification is not yet available.	Confirmed
Mailbox provider	Carries and stores sealed mail as ordinary email.	Sees headers, timestamps and size; never the sealed content.	Confirmed
Web session	Our server holds the working provider credential in memory while the user is signed in.	A live server compromise could reach the sessions online at that moment, never the encrypted store.	Confirmed
Native client	Android and Windows use credentials in device secure storage.	Mail goes between the app and the provider directly.	Confirmed

Loss and compatibility limits.
Specification	Behavior	Limit	State
New device	Enrolled with the passphrase or from a device already enrolled.	Keep a second device enrolled or remember the passphrase.	Confirmed
Lost passphrase and all devices	No recovery path.	No master-key restoration.	Confirmed
Recipient outside Unlike Mail	Sent as ordinary email.	Sealing does not apply.	Confirmed
Other mailbox providers	Not offered.	Google, Microsoft and Zoho only.	Not offered
Mail hosting	Not offered.	Unlike Mail is a client; the mailbox stays with its provider.	Not offered

Recipient discovery
The email-to-public-key directory uses trust on first use; key transparency and fingerprint verification are not yet available.
Confirmed
Web-session boundary
A provider credential is usable in web-session memory while signed in.
Confirmed
Native-client boundary
Android and Windows keep provider credentials in device secure storage.
Confirmed
Cryptographic family
A NIST-standardized post-quantum key-encapsulation mechanism protects each message key.
Confirmed
Independent review
An independent implementation audit is planned; no results are published yet.
Pending

Checkout: Not open yet; nothing is charged today.; Pending
Currency and taxes: Rupees in India, converted at the day's exchange rate; US dollars by international card in the other countries where paid plans are available. Applicable taxes are added.; Confirmed