Melia

Melia is a desktop email client for Linux. It connects directly to your
IMAP and SMTP servers — no cloud relay, no telemetry, no account to sign
up for. Credentials live in your OS keyring, all messages sync to a local
SQLite database, and the renderer applies per-message dark mode and
contrast correction.

Features:
- IMAP and SMTP for Gmail, Outlook, Yahoo, Fastmail, and any standard
mail server
- OAuth2 for Microsoft accounts
- Offline-first: read, search, and queue replies with no connection
- Full-text search across every account and folder
- Per-message dark mode rendering with contrast auditing
- Tracking-pixel neutralization and suspicious-sender warnings
- Drag-and-drop folder organization with multi-account sidebar
- Compose with rich text, inline images, attachments, signatures
- Desktop notifications, dock unread badge, EML file viewer

Free for one account. A one-time $10 unlock removes the account cap.
No subscription, no trial, no recurring charges.