How to Find MBOX File Location in Windows, Mac, Linux & UNIX?
Written By: Sahil Verma 
Updated On October 28, 2026 Written By: Sahil Verma Updated On October 28, 2026 Are you looking for ways to find MBOX file location in Windows, Mac, Linux & UNIX? So, you are in the right place. Here, we will provide a complete step-by-step guide to find MBOX file without wasting time.
We live in the digital era where multiple MBOX-supported email clients, like Thunderbird, Apple Mail, Eudora, etc., are available, and users have a variety of options to choose from to manage mailbox data. There are many professionals who always prefer the use of a desktop-based email client over the usage of a web-based email app. However, due to various reasons, users might want to change their email client.
This is when users want to find MBOX file location of their various email applications. After locating their MBOX files on their systems, users can use an effective method to export their MBOX data to another email client.
The term MBOX is a short form or an abbreviation for Mailbox. These files contain various email messages as 7-bit ASCII text along with several other data files. These MBOX files consolidate all associated emails into a single, unified file while preserving the original formatting of each message.
Initially, MBOX was exclusively used by UNIX but has now been adopted by several other email clients like Mozilla Thunderbird, Apple Mail, Entourage, Eudora, Opera Mail, etc.
MBOX file format can store an email message in the form of a long plain text. Each of these email messages in the MBOX begins with a “From” field with white spaces and ends with blank lines. In addition, MBOX has different family formats and thus shares a common lineage. These family formats are as follows:
MBOX file locations can vary depending on factors such as the operating system (Windows/Mac versions), their respective versions, and the email client in use.
However, sometimes the MBOX folder might be hidden. You can unhide it by going to File Explorer> View> Options>View> Show hidden files, folders, and drives>Apply > OK.
To locate common MBOX file locations in LINUX & UNIX systems, go through the following locations:
| System | MBOX file location |
|---|---|
| System Mail Spool | /var/mail/ |
| User Home Directory | ~/mbox or inside a ~/Mail/ directory |
| Mozilla Thunderbird Profile | ~/.thunderbird/ |
| Mozilla Thunderbird (Snap packages) | ~/snap/thunderbird/common/.thunderbird/ |
| Third-Party Thunderbird Builds | ~/.mozilla-thunderbird/ |
Note: These folders might be hidden; hence, select View > Show Hidden Files to unhide.
To find MBOX file location on macOS, you’ll need to follow these simple steps:
~Library/Thunderbird/Profiles/sample. Default
An additional benefit is that Thunderbird is accessible on all operating systems. Hence, it is significant to know the location of the user’s Thunderbird profile located on their machine.
If you want to view the content of your MBOX file, you can either rely on dedicated email clients. If you don’t have any MBOX-supported email client, or you don’t want to rely on them, a dedicated MBOX viewer tool is the best option.
Kernel MBOX Viewer Tool is an easy software that helps in previewing MBOX email items without using any MBOX email client. The software possesses an easy-to-use GUI and supports 20 MBOX email clients, such as Claws Mail, Evolution, SeaMonkey, Opera, PowerMail, Mulberry, and many more. It also offers a unique feature that helps the user to save the email list information in an HTML file. This filter provides the option to add either a single file or multiple files. Moreover, there is no file size limitation as well.
Locating the MBOX file is a straightforward task, and you don't need advanced technical skills to find MBOX file location. So, here we have provided a comprehensive guide to locate your MBOX files in your local system regardless of your operating system. Moreover, if you want to view the content of these MBOX files, you can utilize reliable software.