How to Split MBOX Files into Smaller Files?

Do you have a large-sized MBOX file and want to split it into smaller files, but don’t know how to do it? If so, then read this blog. In this blog, we have written an automated method to split MBOX files into smaller files.

Overview

MBOX is a file format used to store all email messages in a single mailbox file. MBOX files are supported by many email clients, like Mozilla Thunderbird, Apple Mail, Opera Mail, Google Takeout and more. 

Often, the large size of MBOX files slows down the email client in which it is used. There are more chances of corruption in large-sized MBOX files. Due to these reasons, it is better to split large MBOX files into smaller MBOX files. By splitting, you can overcome size-related issues and better organise emails in smaller MBOX files.

Reasons to split MBOX files into smaller files

• You can share those emails that are required with smaller MBOX files instead of sharing a large MBOX file.

• The chances of corruption of large MBOX files are reduced by splitting them into smaller files.

• The slowdown and hang problem of the email client is reduced by using smaller MBOX files instead of a large MBOX file.

Automated method to split MBOX files into smaller files

With eSoftTools MBOX splitter and Merger software, you can perform the task of Split MBOX file in smaller files. This tool can split MBOX with four different options- Split by size, date, year and email address.

Key features

• With ease and safety, split and merge MBOX files.
• Multiple MBOX can be split and merged at a single time.
• A preview of all MBOX files and folders is displayed in the preview panel before splitting and merging.
• Email formatting and structuring are preserved during splitting and merging.
• Merge MBOX files with three different options: merge all items, merge by date, and merge by year.
• Can split and merge MBOX of any size without any restrictions.
• Choose the desired location to save MBOX files after splitting and merging on your computer.
• Can upload MBOX files supported by email clients like Mozilla Thunderbird, Google Takeout, Apple Mail, and Opera Mail.
• A simple and intuitive graphical interface can be used by anybody easily.
• Consistent with all editions of the Windows Operating System, like Windows 11, 10, 8.1, 8, 7 & below versions.

Steps to split MBOX files into smaller MBOX files

1. Download, install and launch eSoftTools MBOX splitter and merger software on your Windows system.
2. Press the Add File/Folder button on the above menu bar, and a new conversion window will open.
3. Select one option from the three file adding options- Single MBOX file, Single MBOX folder and auto load Thunderbird profile.
4. Preview MBOX files and folders in the preview panel inside the software.
5. Choose the needed files and folders that are to be split and click the Split & Merge button on the above menu bar.
6. Select the saving location on your computer to save MBOX files and click the button to start the splitting process.

Conclusion

A large number of emails are collected over time by sending and receiving emails in an email client. With this collection of emails, the size of the MBOX files increased, and problems arose with large MBOX files. To solve the problem of oversized MBOX files, we have discussed an automated method. If you want to try the software, you can use the free demo version of the software, and if you get the desired result, you can purchase the software.