About Sterna Mail
Sterna Mail is an Android email client that supports JMAP as well as IMAP and SMTP. It can handle multiple accounts in a unified inbox that works offline, and conversations can be threaded. Search updates as the user types, and messages can be snoozed. Users can create multiple sending identities with separate signatures, undo a send, and schedule messages for later. The client supports contacts and calendars through the mail server’s JMAP services, and offers CardDAV and CalDAV as alternatives. Setup can begin with an email address for autodiscovery or use a manual configuration form. Push notifications can use JMAP, IMAP IDLE, or UnifiedPush, without requiring a particular mobile-services provider. OpenPGP encryption is available through a compatible companion app. Remote images and tracking pixels are blocked by default, and the app can be locked with a fingerprint or PIN. Sterna Mail is described as private, ad-free, and without tracking or Google services. It is free software and available in multiple languages. Its focus is email with associated contacts and calendars, with offline inbox access and several notification methods. The product information does not enumerate supported server implementations or describe the full key-management workflow for OpenPGP. The unified inbox can include both JMAP and IMAP accounts, so users can read mail from different server types in one place. Conversations, snoozing, and as-you-type search support everyday reading, while undo send and scheduled delivery provide additional control over outgoing mail. During setup, autodiscovery can find server details from an email address, but a manual form is available when a domain publishes no configuration. Remote content is restricted by default: images and tracking pixels do not load until permitted. These choices give users control over server setup, notification transport, and external content within messages. OpenPGP encryption depends on a compatible companion app. for key handling.
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