How to Import MBOX to Hotmail/Outlook.com in Bulk?

Published By Jamie Kaler

Approved By Rollins Duke

Published On October 12th, 2026

Reading Time 8 Min Read

Are you looking for ways to import MBOX to Hotmail? There is no direct option to import MBOX file into Hotmail account. However, users can migrate MBOX email using a free Thunderbird-based method or dedicated tool. In this guide, we will cover how to import MBOX files to Hotmail (Outlook.com) using manual method in Thunderbird with ImportExport NG add-on, followed by it limitation and then use dedicated tool MBOX to Hotmail Converter to migrate multiple MBOX file in bulk with advanced filter keeping emails data, attachment and folder structure in its original format.

MBOX is commonly used file format for storing email messages from email clients like Thunderbird and Apple Mail. Hotmail is now part of Outlook.com. Hotmail addresses (@hotmail.com, @hotmail.co.uk, etc.) are now managed through Outlook.com, Microsoft’s web-based email service. It manages emails, contacts & calendars. Moving MBOX emails into Hotmail allows users to access their messages online without relying on original MBOX files.

Why Move MBOX Emails to Hotmail Accounts?

There are various reasons why a user may need to import MBOX to a Hotmail account:

To access MBOX emails online via a Hotmail account.
Restoring MBOX backup in the Hotmail account.
For better security, reducing corruption risk, and long-term cloud storage.
To save local storage on your Windows or Mac device.
When migrating email clients to Hotmail webmail.
Better collaboration with Microsoft-related tools.

How to Import MBOX to Hotmail Account on Mac & Windows?

If you are using free Outlook.com account or Microsoft 365, migration process depends on your mailbox access, available storage & login settings. Before starting, make sure you have following requirements for MBOX to Hotmail migration:

However, there are some prerequisites for MBOX to Hotmail migration:

A stable internet connection.
Hotmail credentials, email & password.
Enough storage space to import MBOX files.

Free Way to Upload MBOX File to Hotmail Account Using Thunderbird

The best way to import limited MBOX emails stored on your PC from any email client, like Thunderbird, Apple Mail, Google Takeout, Eudora, or even old orphaned MBOX into Hotmail is to use an intermediate email client such as Thunderbird. It lets you transfer imported MBOX to Hotmail (Outlook.com) with the help of IMAP Sync and ImportExport NG tools.

Download and install Mozilla Thunderbird on your desktop.
Add your Hotmail credentials, email & password.
Sign in with Microsoft API (aka OAuth).
Select IMAP to set up the connection.
For Microsoft’s OAuth2
IMAP server: outlook.office365.com
Port: 993
Encryption: SSL/TLS
Authentication: OAuth2/Modern Auth
Allow the data to be fetched from the account.
Click Menu (three line) >> Themes & Add-Ons.
Search ImportExportTools NG.
Click on Add.
Go to the local folder and right-click.
Choose ImportExportNG >> Import MBOX >> All MBOX from a directory.
Open MBOX files saved on your PC.
Right-click on the newly imported MBOX in Thunderbird.
Choose Move To and select the Hotmail Account as the destination to import MBOX to Hotmail.

Limitations

Transferring large MBOX files can be slow process and may sometimes fail.
Outlook can limit IMAP connections, which can cause process to stop or fail.
It does not offer batch option so user are required to import MBOX file manually.
Folders may not transfer correctly and some email details can be lost or changed.

Quick Way to Import MBOX File to Hotmail (Outlook.com)

The manual Thunderbird method works for small archives and takes lot of manual effort. If you want simple and quick option, a dedicated tool like RecoveryTools MBOX Converter Tool is a direct way to bulk import MBOX files into a Hotmail account without any email client configuration on all Mac & Windows devices. It is a widely trusted software chosen by many professionals & home users due to its ability to handle limitless data, modern security authentication, preview option, complete email structure preservation & its user-friendly interface. If you want to move MBOX emails to Microsoft 365 account then see our guide on Import MBOX Files to Office 365 for non-technical users.

Download Now Purchase Now

A free demo version of the tool lets you import 25 MBOX emails per folder to your Hotmail account.

How to Import MBOX to Hotmail Account in Batch?

First of all, download and install this application on your computer. Launch it and read all the instructions.
Choose Mailbox files with two options i.e. select files or select folders option.
Choose the required mailbox file from the list, if you selected multiple files.
Next, select the Outlook.com option in the list of file saving options.
Also, you can choose the Filter Options for the selective email migration process.
After all, enter your Hotmail account credentials in the user interface.
Finally, hit on the Enter button to import MBOX files to Hotmail account directly.
When the process is finished, click on the OK button.

Manual vs. Automated Method to Transfer MBOX to Hotmail

Are you still contemplating which method is best for you to migrate MBOX to Hotmail? Here is a quick table of comparison between them:

Feature	MBOX to Hotmail converter	Manual Method
Bulk Import	Import Multiple Large MBOX Files	Limited to 4GB of Data
Data Integrity	Fully Preserved with Metadata	Risk of Attachment & Folder Structure Loss
Data Security	100% Secure – Modern Authentication	Secure
Corruption Handling	Minor MBOX Corruptions	None
Filter Option	Date, To/From & Keywords	No Filters
Time Taken	Quick & Easy	Manual & depends on IMAP sync
Storage Space Required	Around 100 MB for the application	2 to 3 times the space of MBOX files
Cost	Free Demo Version	Free

If you want to move MBOX emails into the Outlook desktop application instead of Hotmail, read our guide on Import MBOX to Outlook. Alternatively, If you want to convert MBOX files into PST format first, see how to Import MBOX to PST before moving the data to Outlook.

Top Advantages of MBOX to Hotmail Migration Tool

Import Multiple MBOX to Hotmail:

One of the best features of this utility is batch migration. Yes, you can import multiple MBOX files into your Hotmail (Outlook.com) at once. The software provides dual selection options, which allow you to choose multiple Mailbox files at once. So, you can easily import bulk MBOX files to a Hotmail account without any issues.

Keep your Email Properties:

The software keeps your email properties during the process. It allows you to import MBOX emails to a Hotmail account. While the process, the tool preserves MBOX email with attachments, date and time, addresses, internet header, images, text, hyperlink, etc.

Maintain Email Hierarchy Structure:

The software keeps the MBOX folder hierarchy structure during the process. Especially, when you upload Gmail, export the MBOX file to a Hotmail account. While the process, never change your folder structure.

Migrate only Selective Emails:

The program is developed with the best programming algorithms to migrate only specific emails. So, you can easily export MBOX emails to Hotmail by Date Range, To, From, Subject, etc. By using these advanced settings.

Support Windows & Mac Computers:

The software supports all editions of Microsoft Windows as well as Mac OS. For Windows such as Windows 11, Windows 10, 8.1, 8, 7, as well as Server 2025, 2022, 2019, 2016, etc. Also, you can use this application in your macOS such as 26 Tahoe, 15 Sequoia, 14 Sonoma, 13 Ventura, 12 Monterey, 11 Big Sur and earlier versions.

Common Asked Queries

Can I use this application to import old MBOX files to Hotmail account ?

Yes, the software provides direct way to import all old MBOX to Hotmail account without any issues.

Does the software support Apple Mail MBOX, I want to import MBOX to Hotmail account ?

Yes, the software supports all types of MBOX files. And you can easily import this file to Hotmail account without any issues.

Does the software keep my email metadata properties during process ?

Yes, it keeps all your MBOX emails with attachments without any issues.

Can I import MBOX files to Hotmail ?

Yes, Users can use Thunderbird with ImportExport NG add-on as a free method as Hotmail (Outlook.com) does not offer any direct option to import MBOX files or use Dedicated MBOX migration software to transfer MBOX email to Hotmail.

Can I migrate MBOX files to Hotmail in bulk?

Yes, you can migrate multiple MBOX files to Hotmail in bulk using dedicated MBOX to Hotmail migration tool. It can process multiple files at once and offers options to filter emails before migration.

Conclusion

The above article described the way to import MBOX files into Hotmail accounts. After reading this article, you will understand the complete way to upload multiple MBOX files to a Hotmail account. You can use this solution on both Windows and Mac computers. If you have any issues related to the software and its process. Write us or chat with the technical support team, if you want more information.