K-9 Mail 與 FairEmail, privacy aware email 使用情況與統計

FairEmail is easy to set up and works with virtually all email providers, including Gmail, Outlook and Yahoo! FairEmail might be for you if you value your privacy. FairEmail is simple to use, but if you are looking for a very simple email app, FairEmail might not be the right choice. FairEmail is an email client only, so you need to bring your own email address. FairEmail is not a calendar/contact/task/note manager and cannot make you coffee. FairEmail does not support non-standard protocols, like Microsoft Exchange Web Services and Microsoft ActiveSync. Almost all features are free to use, but to maintain and support the app in the long term, not every feature can be for free. See below for a list of pro features. A lot of effort has gone into this mail app, which was developed to help you protect your privacy. If you have a question or problem, there is always support at marcel@faircode.eu. Main features * Fully featured * 100% open source * Privacy oriented * Unlimited accounts * Unlimited email addresses * Unified inbox (optionally accounts or folders) * Conversation threading * Two way synchronization * Push notifications * Offline storage and operations * Common text style options (size, color, lists, etc.) * Battery friendly * Low data usage * Small (<30 MB) * Material design (including dark/black theme) * Maintained and supported This app is deliberately minimalistic by design, so you can concentrate on reading and writing messages. This app starts a foreground service with a low-priority status bar notification to make sure you'll never miss new emails. Privacy features * Encryption/decryption supported (OpenPGP, S/MIME) * Reformat messages to prevent phishing * Confirm showing images to prevent tracking * Confirm opening links to prevent tracking and phishing * Attempt to recognize and disable tracking images * Warning if messages could not be authenticated Simple * Quick setup * Easy navigation * No bells and whistles * No distracting "eye candy" Secure * No data storage on third-party servers * Using open standards (IMAP, POP3, SMTP, OpenPGP, S/MIME, etc.) * Safe message view (styling, scripting and unsafe HTML removed) * Confirm opening links, images and attachments * No special permissions required * No advertisements * No analytics and no tracking (error reporting via Bugsnag is opt-in) * Optional Android backup * No Firebase Cloud Messaging * FairEmail is an original work, not a fork or a clone Efficient * Fast and lightweight * IMAP IDLE (push messages) supported * Built with latest development tools and libraries Pro features All pro features are convenience or advanced features. * Account/identity/folder colors/avatars * Colored stars * Notification settings (sounds) per account/folder/sender (requires Android 8 Oreo) * Configurable notification actions * Snooze messages * Send messages after selected time * Synchronization scheduling * Reply templates * Accept/decline calendar invitations * Add message to calendar * Automatically generate vCard attachments * Filter rules * Automatic message classification * Search indexing * S/MIME sign/encrypt * Biometric/PIN authentication * Message list widget * Export settings Support If you have a question or problem, please check here first: https://github.com/M66B/FairEmail/blob/master/FAQ.md If you cannot find what you are looking for, please contact me at marcel+fairemail@faircode.eu, and I will try to help you.