For Desktop-E-Mail-Client, the strongest matches are pimalaya/himalaya (Himalaya is a terminal-based email client built in Rust), neomutt/neomutt (NeoMutt is a terminal-based email client that supports IMAP) and foundry376/mailspring (Mailspring is a cross-platform desktop email client that unifies). nylas/nylas-mail is also worth a look. Each is ranked by relevance to your query, popularity and recent activity.
Open-Source-Desktopanwendungen zur Verwaltung und Synchronisierung mehrerer E-Mail-Konten in einer einzigen Oberfläche.
Himalaya is a command line email client and a suite of toolsets for email protocol implementation. It provides a terminal-based interface for managing email accounts using IMAP and SMTP protocols. The project includes a PIM framework and specialized libraries for building personal information management applications that integrate emails, contacts, calendars, and tasks. It features a PGP email encryptor for end-to-end encrypted communication and an email data exporter that extracts messages and metadata into JSON format for use in external scripts. The system covers a broad range of email ma
Himalaya is a terminal-based email client built in Rust that supports IMAP/SMTP, PGP encryption, and offline syncing, so it fits the core request for a desktop email client even though it lacks a graphical interface and some requested features like unified inbox, calendar integration, and push notifications.
NeoMutt is a terminal-based electronic mail management system that provides a text-based user interface for reading and composing emails. It functions as a mail manager and client supporting IMAP, POP3, and SMTP protocols, as well as NNTP for newsgroup access. The project distinguishes itself through integrated support for PGP and S/MIME encryption, providing tools for signing and encrypting messages and managing cryptographic keys. It supports modern authentication via OAuth2 and offers specialized MIME-aware reading capabilities for decoding multipart messages and visualizing MIME structure
NeoMutt is a terminal-based email client that supports IMAP, POP3, multiple accounts, and PGP encryption, directly matching the request for a desktop email client, though it lacks calendar integration and push notifications.
Mailspring is a cross-platform desktop email client designed to aggregate multiple accounts into a single, unified inbox. It utilizes standard protocols to synchronize messages and provides a centralized interface for managing professional correspondence across different email services. The application distinguishes itself through a suite of productivity tools that include automated message scheduling, follow-up reminders, and email engagement tracking to monitor recipient interactions. It also features contact enrichment to surface professional context and historical data, alongside built-in
Mailspring is a cross-platform desktop email client that unifies multiple accounts into a single inbox with IMAP support, search, and productivity tools, but it lacks explicit support for PGP encryption, offline mode, calendar integration, and push notifications, making it a good fit for the category though not a fully comprehensive option.
This project is a cross-platform desktop email client built with web technologies. It serves as an extensible mail application that allows users to manage and organize email correspondence and can link to self-hosted synchronization engines to manage user data. The application is designed for extensibility through a plugin architecture and logic extension hooks, enabling the addition of custom features such as text translation, email templating, and external service integrations. It further distinguishes itself by providing a customizable interface that supports user-defined CSS styling and t
Nylas Mail is a cross-platform desktop email client with support for multiple accounts and extensibility via plugins, but it may lack built-in PGP encryption, offline mode, and calendar integration out of the box, making it a narrower fit for your feature list.