One of the quickest ways to transfer Thunderbird emails to MSG files is by using EmailSoftwares Thunderbird to MSG Converter. This tool enables seamless conversion of Thunderbird mailboxes to MSG format while preserving email properties like To, Cc, Bcc, Subject, Attachments, and more. It supports bulk conversion, offers a preview feature, and allows users to choose the destination folder. The software maintains folder structure and email integrity without requiring additional programs. Try the free trial version to evaluate its features before purchase.