A modern, open-source groupware client for self-hosted email.
Developed for our managed hosting customers. Grown into a full groupware suite - email, calendar, contacts, and filters. Released as open source for the self-hosting community.
JMAP is the modern successor to IMAP. Faster synchronization, real-time push, cleaner API.
Organizations and individuals who self-host their email. No tracking, no ads, full control over your data.
Designed for Stalwart, the mail server powering our infrastructure.
Screenshots from the application
Login
Inbox
Message view
Compose
Dark mode
Settings
Built for modern email workflows
JMAP push keeps your inbox synchronized instantly. Live unread counts and connection status indicator.
External content blocked by default. HTML sanitized with DOMPurify. SPF, DKIM, DMARC verification and TOTP 2FA.
Compose, reply, forward, threading, attachments, draft auto-save.
Full-text search across all messages. Color-coded labels, star, and archive.
Month, week, day, and agenda views. Event management, iTIP invitations, .ics support.
Contacts and groups with vCard import/export. Autocomplete and JMAP sync.
Reusable templates with placeholders. Categories and quick template picker.
Sieve-based rules with a visual builder. Raw editor and drag-and-drop ordering.
Date-range scheduling with sidebar indicator. Automatic out-of-office replies.
Sender identities with per-identity signatures. Sub-addressing support.
EN, FR, JA, ES, IT, DE, NL, PT. Automatic browser language detection.
Complete keyboard navigation, drag-and-drop, context menus.
Built with tools we trust
We can deploy and manage JMAP Webmail for you. European servers, GDPR compliant, dedicated support.
Talk to our team