K-9 Mail

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable...

Free
Open Source
Android
Android Tablet

K9 is an open source email client for Android with multifolder sync, email signatures, Bcctoself, returnaddress configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.

Links to official K-9 Mail sites

GitHub
Official Website

Features

Privacy focused Ad free Multiple Account support PGP Encryption

The Best 8 K-9 Mail Alternatives

multiple-account-support filter is active.

1709 Like

Thunderbird

thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. the project strategy is modeled after mozilla firefox.

Free Open Source Windows Linux BSD Mac Haiku

Customizable Extensible by Plugins/Extensions Portable Integrated Chat Built in RSS reader Calendar integration Free API Import from Google Reader Integrated Web Browser Multiple Account support Export to OPML Import feeds from OPML POP3 Support Tabbed interface
75 Like

Claws Mail

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility ...

Free Open Source Windows Linux BSD Xfce

Customizable Extensible by Plugins/Extensions Support for IMAP Multiple languages Built in RSS reader Multiple Account support Lightweight Content Filtering
54 Like

Airmail

Airmail is a lightweight and lightning fast mail client for Mac. Feature list: Accounts: - Unified Inbox and folders - Multi Account with editable html signatures.

Commercial Mac OS X iPhone iPad Apple Watch

Customizable Multiple Account support Lightweight Dropbox integration Fullscreen support
20 Like

Astro

Modern email and calendar apps for Mac, iOS, Android, Slack and Alexa, powered by Artificial Intelligence. Astro keeps you focused on what's most important.

Free Android iPhone iPad Mac Slack Amazon Echo (Alexa Voice Service)

Calendar integration Multiple Account support Email tracking Google Calendar integration Snooze reliability
17 Like

Mailspring

Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.

Freemium

Customizable Extensible by Plugins/Extensions Support for IMAP Sync Contacts Multiple Account support Drag n drop Support for Themes Dark theme Conversation view Unified inbox Email tracking Email Analytics Email tracking & analytics
17 Like

TypeApp

TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email...

Free Personal Android iPhone Android Tablet iPad Android Wear Kindle Fire

Multiple Account support Live Push Notifications Unified inbox
3 Like

Koma-Mail

Koma-Mail is an email client which is comfortable and has very handy functions. It does not need an installation, so that you can run Koma-Mail from your flash drive...

Free Windows

Portable Multiple languages Built in RSS reader Multiple Account support POP3 Support Support for Unicode
2 Like

Nylas Mail Lives

nylas mail lives is a fork of nylas mail that fixes many longstanding issues, improves the client experience, and is committed to...

Free Open Source Mac OS X Windows Linux Self-Hosted

Extensible by Plugins/Extensions Multiple Account support

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K-9 Mail

Links to official K-9 Mail sites

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The Best 8 K-9 Mail Alternatives

Thunderbird

Claws Mail

Airmail

Astro

Mailspring

TypeApp

Koma-Mail

Nylas Mail Lives

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