About Ltt.rs
Ltt.rs, pronounced “Letters,” is an early-stage Android email client built around the JMAP protocol. It uses server caching to keep mail data readily available, though it is not fully offline. For example, marking a thread as read requires a round trip to the server to update state such as unread counts; the app description says the action itself is retained if attempted while offline. The client has a deliberately narrow account setup and settings workflow rather than offering many configuration options. Its design emphasizes a focused JMAP email experience and first-class support for Autocrypt. The app draws on a shared email-client library for handling core mail operations, with the Android application providing the user interface and data storage. Ltt.rs is presented as a proof of concept, so users should expect a limited feature set and ongoing development rather than a general-purpose mail client for every account type. The available information recommends more established clients for users who need broader configuration. Its intended audience is someone interested in a simple JMAP-based client with strong caching and a constrained set of settings.
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