Import Windows Mail to Thunderbird - Version 3.8 To import Windows Mail to Thunderbird, use the EML to MBOX Converter Tool. The EML to Thunderbird converter tool is very simple solution to import Windows Mail to Thunderbird in less time. With this utility, users can easily and perfectly import eml files from Windows Mail to Thunderbird without any difficulty. The Windows Mail to Thunderbird tool saves all email attributes - attachments, formatting, header information, etc. This Windows Vista Mail to Thunderbird tool supports easy steps to Import Windows Mail to Thunderbird with more effects. Use its free demo version facility to import 10 emails from Windows Mail to Thunderbird. Buy complete version at 49USD to Import Windows Mail to Thunderbird.