K‑9 Mail is a free, open‑source email client for Android that supports virtually every email provider. It’s lightweight, privacy‑friendly, and designed for users who want full control over their email experience.

📨 Works with IMAP, POP3, and Exchange (via WebDAV)

🔒 Privacy‑respecting, no ads or tracking

⚡ Fast, lightweight, and reliable performance

🎨 Customizable notifications, themes, and folder management

🌐 Community‑driven project with active development

Perfect for: Android users who want a secure, flexible, and open‑source alternative to proprietary email apps.