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FossaMail 25.2.1

A free Thunderbird-based chat, news and email client for Windows

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FossaMail screenshotFossaMail is an chat, news and email client built on the base of Mozilla Thunderbird. The program is stable and ensures smooth operation. It uses a separate profile that allows it to run on your system without interfering with already existing Thunderbird installations. The program supports all Thunderbird extensions and plugins and runs on both 32-bit and 64-bit system architectures. In additional, the application offers an optional calendar / organizer add-on that lets you use it in a way similar to Microsoft Outlook.

FossaMail does NOT support Windows XP. It can be used on MS Windows Vista and above. It also requires a CPU that supports the SSE2 set of instructions. An active Internet connection is also required.


  • Supports all Thunderbird extensions and add-ons.
  • It's easy to install and configure.


  • Supports only SSE2 CPUs.
Name FossaMail
Version 25.2.1
Developer | see all products from this developer
Product Homepage FossaMail
License Free (Freeware)
Last Week Downloads 1
All Time Downloads 107
Filename FossaMail-25.2.1.win32.installer.exe
Filesize 20.4MB
MD5 Checksum 365AFBB8DEC91BA74A18A40A269C3EA1
OS Support Win 8/8.1/10/Vista/7
Category Internet

100% CLEAN Certification

BadgeFossaMail has been tested by team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. Our editors will recheck this software periodically to assure that it remains clean.


Old Versions

Software Date Added
FossaMail 25.2.1 April 19, 2016 - Latest Version
FossaMail 25.1.6 July 31, 2015
FossaMail 24.7.0 August 06, 2014
FossaMail 24.6.0 July 25, 2014

Download the free FossaMail