mail tdb.exe is part of a product called known as Mozilla Thunderbird, Portable Edition and the developer is PortableApps.com .
If you think that this file contains a virus or another malware, please download a virus scanner.
If mail tdb.exe is using too much CPU or too much memory in your system, it is possible that your file has been infected with a virus. Installing an antivirus is recommended.
Not all processes can be uninstalled without the help of a 3rd party tool, especially malware. To see if it can be uninstalled, first go to Start > Control Panel > Add/Remove programs and select Mozilla Thunderbird, Portable Edition from the list to remove the process mail tdb.exe from your computer.
If you have any problems with mail tdb.exe, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting PortableApps.com, the developer of mail tdb.exe and ask for more information.