How to bulk transfer MSG files into Thunderbird mailbox?

[Client brendybenoite]

The right choice for users who want to import MSG to Thunderbird safely is Yota MSG Converter. It supports unlimited file conversion, making it an excellent option for businesses and individuals alike. The tool ensures no data is lost during migration, including email addresses, formatting, inline images, and attachments. Its selective conversion feature helps you import only the emails you need, saving storage space in Thunderbird. The software maintains folder hierarchy, ensuring your mailbox looks well-organized after migration. Designed for speed and accuracy, it’s a reliable solution that anyone can operate with confidence.

[JayJacob]

To bulk transfer MSG files into a Thunderbird mailbox, the most straightforward method involves using the ImportExportTools NG add-on for Thunderbird, as Thunderbird doesn't natively support this function. First, install the add-on from the Thunderbird Add-ons page. Then, select the target folder in your Thunderbird local folders or account structure where you want to import the MSG files. Right-click the folder, navigate to ImportExportTools NG, and choose the option to Import all messages from a directory (or a similar option for importing EML files, as the add-on often handles MSG by converting them to EML first, or you may need to first convert the MSG files to EML format using a separate tool before using the add-on). Specify the folder on your computer containing the MSG files to begin the bulk import process. 
Otherwise, get the EML Converter by MacUncle to transfer EML files straight to the Thunderbird profile folder. The tool will move the email messages without the need for additional software support.
For more details, check out the article - import EML files into Thunderbird.

[Client norareed]

MSG files are Outlook-specific, so Thunderbird can’t open them directly. To import MSG files into Thunderbird you first need to convert them into a format Thunderbird supports such as MBOX. The easiest and most reliable way to do this is by using a professional tool like Softaken MSG to MBOX Converter. This software lets you convert multiple MSG files at once into a single MBOX file without losing data. It preserves all email properties, including attachments, metadata, formatting and folder hierarchy. The tool works with all versions of Windows and doesn’t require Outlook to be installed. It also includes a free trial version and technical support for users.

[Client norareed]

Thunderbird does not support MSG files directly since they’re created by Microsoft Outlook. To import MSG emails into Thunderbird, you first need to convert them into a Thunderbird-compatible format like MBOX. The easiest way to do this is by using a reliable tool such as DataVare MSG to MBOX Converter. This software lets you convert multiple MSG files at once into a single MBOX file without losing any data. It maintains all key elements like attachments, formatting, sender/receiver details and folder hierarchy. The tool works without Outlook, supports all Windows versions and offers a free trial along with technical support.