eM Client is an email client, webmail service, or mail productivity tool for managing inboxes.
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Use plain text email is a guide explaining plain text and HTML email, recommending email clients that compose plain text by default and giving setup instructions for other clients. It also covers etiquette recommendations and reasons to prefer plain text, and is brought to you by sourcehut.
Can I Email? provides support tables for HTML and CSS features in email clients. The site lists features and tracks support across clients such as Apple Mail, Gmail, Outlook, Yahoo! Mail and others, and includes a client scoreboard.
Mailspring is a native email client for Mac, Windows, and Linux supporting multiple accounts including IMAP and Office 365. Its Pro tier adds read receipts, link tracking, send later, follow-up reminders, and templates. The client is free to download, with Pro at $8/month.
Desktop email client with unified inbox, search, themes, and productivity features.
Open source email client for managing mail, calendars, contacts, and add-ons across accounts.
Microsoft email and calendar service for personal, business, and web-based mail management.
Canary Mail is an email client with AI features and a built-in calendar for Mac, iPhone, iPad, Windows and Android. It offers a unified inbox for multiple accounts, AI Copilot drafting and summaries, and privacy-focused features such as on-device triage.
Monocles mail is a secure and open source e-mail client for Android, described as a fork of K-9 mail that keeps the known functions of K-9 mail with some UI updates. It supports multiple accounts, a unified inbox, local and server-side search, and OpenPGP email encryption. The source states it is privacy-friendly, with no tracking and only connecting to the user's email provider.
Microsoft email and calendar service for personal, business, and web-based mail management.
Roundcube is free and open source webmail software written in PHP. It is a browser-based multilingual IMAP client with a desktop-like interface offering drag-and-drop message management, MIME and HTML support, address book with groups and LDAP connectors, threaded message listing, spell checking, shared IMAP folders and a plugin API. It supports PGP encryption and is released under the GNU General Public License version 3 or later.
The addy.io app for Android is the Android client for addy.io, formerly AnonAddy, a service for anonymous email forwarding. The GitLab project hosts the app's source under the MIT License and includes a changelog.
Claws Mail is an email client and news reader based on GTK+. It offers multiple accounts, threaded display, filtering and MIME attachments, plus Usenet news reading and posting, with SSL over POP3, SMTP, IMAP4rev1 and NNTP. Messages are managed in the standard MH format, and additional functionality is provided by plugins. It is distributed under the GPL.
Comfy.Guide is a collection of computer guides. Its server software section covers self-hosting services such as email, DNS, IRC, Matrix, XMPP and PeerTube. Its client software section covers desktop tasks, including disk encryption, GnuPG, the KISS Linux distribution and using NVIDIA on Linux.
Edbrowse is a text-based combination editor, browser, and mail client with an interface similar to /bin/ed. It was originally written for blind users but is also used by sighted users for its scripting capabilities. A batch or cron job can access web pages, submit forms, and send email without human intervention. Edbrowse can also access databases through ODBC.
OpenPanel is a multi-user web hosting control panel built around lightweight containers. Each user gets an isolated environment with a separate MySQL server, PHP version, Redis instance and root access. Administrators and resellers manage servers through the OpenAdmin panel, and the OpenPanel interface lets clients manage domains, websites, services and email. OpenCLI provides terminal commands for panel actions.
Scroll Anywhere is a Firefox browser extension that enables page scrolling without interacting with the browser scrollbar. Users can press the middle, right or left mouse button anywhere on a page to scroll, and the extension also supports grab-and-drag scrolling, customizable scrollbars, and momentum auto-scroll. It is also available for the Thunderbird 78 email client.
Tuta Calendar is an encrypted calendar that organizes events with end-to-end encryption and a zero-knowledge architecture. It offers push notifications, two-factor authentication, and sharing of calendars and events. Apps are available for Android, iPhone, and open source desktop clients for Windows, macOS and Linux. It is also integrated with email.