Apps with 'HTML Compose' feature

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Thunderbird
Free • Open Source
Email Client
Calendar App
Mac
Windows
Linux
BSD
AppImageHub
Snapcraft
Flathub
PortableApps.com
Haiku
Homebrew
Chocolatey
95 Thunderbird alternatives
Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
Suggest and vote on features
Thunderbird Features
1. Extensible by Plugins/ExtensionsThunderbird can be extended with add-ons, plugins and extensions.
2. Multiple Account supportThunderbird support multiple accounts without the need to logout and login
3. Calendar IntegrationThunderbird lets you sync your tasks and events with your calendar application.
4. Email OrganizerThunderbird allows you to take control of your inbox by filtering and control tools.
5. Dark ModeThunderbird supports dark mode for comfortable usage in low light conditions.
6. OpenPGPThunderbird supports OpenPGP, a standard of PGP encryption that is open-source for public use.
7. GPG EncryptionThunderbird supports GPG (aka GnuPG) for encryption of things like emails, messages, files, etc.
8. PortableThunderbird can be used from a USB stick or similar with no prior installation.
9. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Thunderbird.
IMAP Support
SMTP Support
FOSS
Add-ons
Built-in RSS reader
Intuitive
Graphical User Interface
Customizable
POP3 Support
Integrated Web Browser
Top 3 alternatives
Interlink Mail & News
Free • Open Source
Email Client
Windows
Linux
12 Interlink Mail & News alternatives
Interlink Mail & News is a free e-mail client based on open source community code built on the Unified XUL Platform. It is available for Microsoft Windows and Linux (with other operating systems in development).
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Interlink Mail & News Features
1. Multiple Account supportInterlink Mail & News support multiple accounts without the need to logout and login
2. Ad-freeInterlink Mail & News doesn't contain any form of external advertising.
3. WYSIWYG SupportInterlink Mail & News integrates a WYSIWYG editor to edit the look and content of a document, page, or file.
4. Support for ThemesYou can use themes and templates to change the look and feel of Interlink Mail & News.
5. Spam FilterInterlink Mail & News can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
6. Integrated Password ManagerInterlink Mail & News lets you access all the passwords you’ve saved across your different devices.
7. Works OfflineInterlink Mail & News can be used without the need to connect to the internet.
8. Extensible by Plugins/ExtensionsInterlink Mail & News can be extended with add-ons, plugins and extensions.
9. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Interlink Mail & News.
HTML Compose
IMAP Support
Legacy addons support
SMTP Support
Free API
POP3 Support
Built-in RSS reader
Integrated Web Browser
S/MIME Support
Top 3 alternatives
Icedove-UXP
Free • Open Source
Email Client
Linux
17 Icedove-UXP alternatives
Historically, Icedove was a re-branding of Thunderbird by the Debian project, with minimal modifications, in order to resolve branding disputes. Debian since discontinued Iceweasel in February of 2017 after reaching an agreement with Mozilla over the use of it's trademark.
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Icedove-UXP Features
1. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Icedove-UXP.
2. Integrated Password ManagerIcedove-UXP lets you access all the passwords you’ve saved across your different devices.
3. Support for ThemesYou can use themes and templates to change the look and feel of Icedove-UXP.
4. Multiple Account supportIcedove-UXP support multiple accounts without the need to logout and login
5. Extensible by Plugins/ExtensionsIcedove-UXP can be extended with add-ons, plugins and extensions.
6. Calendar IntegrationIcedove-UXP lets you sync your tasks and events with your calendar application.
Built-in Calendar
Gmail integration
IMAP Support
Tabbed interface
Legacy addons support
Customizable
S/MIME Support
Free API
Google Calendar integration
Built-in RSS reader
Add a screenshot
Top 3 alternatives

Thunderbird

Thunderbird Features

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Interlink Mail & News

Interlink Mail & News Features

Top 3 alternatives

Icedove-UXP

Icedove-UXP Features

Top 3 alternatives