Safely Upload MBOX Files into Rackspace Email Account

  Kumar Raj
Written By Kumar Raj
Anuraag Singh
Approved By Anuraag Singh
Modified On August 12th, 2025
Reading Time 6 Minutes Reading

Users who want to import MBOX to Rackspace have come to the right place. In this article, I will explain how you can easily move your MBOX file into a Rackspace account. Furthermore, I will also explore how to secure your Rackspace mailbox when uploading an MBOX file.

For a standard email file format, the MBOX file is used by many programs. Mozilla Thunderbird, Apple Mail, Notepad, or even Gmail that exports its mailbox in MBOX format. Therefore, it is a common way to store multiple email messages with attachments and headers.

But if you have a Rackspace email and want to access the MBOX file. Then, it might be difficult for you because there is no direct option available. Rackspace is a business email hosting service that runs on a cloud platform. MBOX file, on the other hand, is stored in local storage. So, importing your desktop file into a cloud platform is difficult for many users. But here I am, going to help you.

Reasons to Import MBOX to Rackspace

First, let’s see the scenarios where you need to move your MBOX files into Rackspace.

  • You are moving from Thunderbird or any other email client to Rackspace. So, you want to move the files into the Rackspace mailbox.
  • Managing multiple email accounts is really hard. Therefore, moving your important emails to
  • Rackspace makes it easier for you to organize your data.
  • You have an old MBOX file that you want to access from the Rackspace email account.
  • When a business merges or acquires then you also have to move your MBOX file to the Rackspace account.
  • As a backup purpose, you can save the MBOX file in Rackspace email.

Therefore, there are several reasons to import MBOX files, and I am going to explain to you the methods in the upcoming section of the article.

Preparations Before Uploading MBOX Files

Before you import the file, you have to first take some precautions so that the process will be smooth.

  • First of all, check the size of your MBOX file and also check if the email message is unexpectedly corrupted in MBOX file or not.
  • There is a risk of overwriting or data loss in the Rackspace mailbox. So, create a copy of your Rackspace existing data.
  • Make sure that the IMAP is properly enabled in Rackspace
  • Switch on to the channel that has a strong internet connection.
  • If the mailbox is almost full, reduce it so that you can easily open your MBOX file.
  • Properly save your Rackspace login credentials. If your account uses 2FA, then make sure it is properly applied.

After properly following these steps, you can now go through the process to import the file.

Import MBOX to Rackspace using Thunderbird

Rackspace and Thunderbird both support the IMAP server. So, with the help of this, you can easily move your MBOX file. To do this, the process is lengthy, which I will divide into two parts. The first part is to configure the Rackspace account in Thunderbird.

  1. First, log in to your Thunderbird account and go to the Account Settings by clicking on the three bars at the top.
  2. Then, select the Account Actions option.
  3. Press the Add a mail account button.
  4. Provide the Rackspace email address and password. Enter 2FA password if it is enabled.
  5. Choose the IMAP option, and Thunderbird automatically connects to your Rackspace account.

Move MBOX File from Thunderbird to Rackspace

  1. First, import the file by right-clicking on the folder where I want my email data.
  2. Select the Import/Export Tools NG option and then import MBOX files.
  3. Click on Import all individual files or import the directories.
  4. Browse the location where your MBOX file is located and open it.
  5. Once it is accessed by Thunderbird, you can move it to the Rackspace mailbox by the drag and drop option.

By properly following this method, you can easily move your MBOX file into RackSpace. However, importing your data into Rackspace can also create issues, which I have explained below.

Common Risks Involved with Rackspace Mailbox during Import Process

Although if you carefully follow the steps and do the preparations, you will not have any problems. But you should focus more on the Rackspace mailbox in the process. Because when you are adding external files to an already existing mailbox. There are chances that you may face issues that I have mentioned below.

  • If the emails in the MBOX file already existed in the Rackspace mailbox. In this situation, you will get data duplication problems.
  • If your MBOX file structure is not correct or the file is corrupted. It is very risky to move the files to Rackspace.
  • Accidental deletion or overwriting is a major issue when you are manually dragging and dropping data.
  • Your Rackspace mailbox is oversized, so you have to first reduce the space to import the new data.
  • Some MBOX files may contain malware attachments or any suspicious links that can cause Rackspace email outage or any other issue.

To avoid these problems, it is better to backup your Rackspace mailbox. So that if anything happens after the process, you at least have the data to access it.

How to Save Rackspace Mailbox?

To easily and securely store your Rackspace data, use the SysTools Rackspace Backup Tool, a specialized tool to save the Rackspace emails and other data. It is very easy to use the software because of its user-friendly interface. The user can store bulk Rackspace data while preserving the original data. Additionally, you can store your Rackspace emails in various file formats like PST, EML, PDF, etc., which helps you to migrate Rackspace to Gmail or any other program. Therefore, this option would be a great choice to use before importing the MBOX file.

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Concluding Words

Those who have issues with moving the file in Rackspace. Read the article to the end. Here, I have provided a simple way to import MBOX to Rackspace. In addition to this, I have discussed the preparations and the risks you may face when uploading the file. In that case, prepare a backup of our Rackspace mailbox. So that you can easily get your data.

  Kumar Raj

By Kumar Raj

He is an ardent tech enthusiast and has a specialization in simplifying complex tech topics. With a knack for staying ahead of the curve, he provides readers with up-to-date insights into the ever-evolving tech world. When he is not writing, he enjoys exploring new gadgets and is actively engaged in tech communities.