FossaMail - a Thunderbird Clone (by Pale Moon developer)

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Staff Member
Jan 8, 2011

FossaMail is an Open Source, Mozilla Thunderbird-based mail, news and chat client for Windows, brought to you by the Pale Moon developer (and therefore not affiliated with the Mozilla Corporation). It is an optimized and reconfigured re-build of Mozilla Thunderbird ESR.

  • Is built from source with compiler optimizations geared towards an as stable and smooth operation of the client as possible (Pale Moon-alike optimizations).
  • Uses its own profile folder on your system. This means it will not interfere with existing Thunderbird installations.
  • The default profile location is %APPDATA%\FossaMail
  • Should be compatible with all Thunderbird add-ons and plugins.
  • Is available in 32-bit (x86) and 64-bit (x64) versions.
  • Comes with an optional calendar/organizer add-on (Lightning) that will allow it to be used in a Microsoft Outlook style information manager fashion.
System requirements:
  • Windows Vista or above (Windows XP is not supported)
  • A processor with SSE2 support
  • Sufficient hard drive space to install and store your e-mail and other data
  • An internet connection ;-)
  • Like
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