How to Import MBOX to Zimbra Mail?

  Kumar Raj
Written By Kumar Raj
Anuraag Singh
Approved By Anuraag Singh
Modified On August 14th, 2025
Reading Time 5 Minutes Reading

Are you switching from MBOX-based email accounts to Zimbra, or are there any other reasons to import MBOX to Zimbra Mail? In this article, I will explain how to upload your MBOX file easily. So, read the article to the end.

Know About Zimbra Mail

Zimbra Collaboration Suite is a collaboration platform that provides you enterprise-grade level tools. Most users use this program to combine email, calendar, contacts, tasks, and file sharing from one environment. Zimbra is a web-based email program, which means you can easily access your account from any device and also support POP, IMAP, and ActiveSync protocols. It supports TGZ format, so you cannot directly import a MBOX file. However, there is a workaround that you can use to move your MBOX file to Zimbra Mail.

Reasons to Import MBOX to Zimbra Mail

Before going through the steps to move the MBOX file to Zimbra. It is important to know the reasons behind uploading your MBOX file. Below are some of the reasons for this process.

  • Moving your MBOX-supported desktop email client to the Zimbra web-based platform.
  • Saving the files in Zimbra allows you to manage your email from one account.
  • Zimbra integrates with server productivity and collaborative features. So, it is best to move your file to avail those functions.
  • You can easily access your Zimbra account from any device. Whether you are using a computer or a mobile device.
  • For backing purposes, you are moving your MBOX file to the Zimbra account.

Hence, there are several reasons for importing MBOX files to Zimbra Mail, and now let’s see how you can do this.

Use Thunderbird to Move MBOX File to Zimbra Mail

Thunderbird can also be used to upload MBOX files to Zimbra. For that, you have to configure your account in Thundebir and import it using the Import/Export Tools NG.

  1. First, I am going to connect the Zimbra email account to Thunderbird.
  2. Go to the Account Settings by clicking on the three bars at the top-right corner.
  3. Click on the Account Action and Add a Mail Account.
  4. Provide the Zimbra Account details and configure it.
  5. After that, import the MBOX file using the Import/Export Tools NG.
  6. Once your file is properly imported to the Thunderbird folder. Move them to the Zimbra mail folder.

The data will automatically sync to the Zimbra web client. Here are all the possible ways that you can use to get your data.

Issues in Managing Zimbra Mailbox After the Procedure

Although the above method helps you move your MBOX files. But if something goes wrong while uploading the MBOX file, it will affect the Zimbra mailbox. Some common issues are.

  • Moving an MBOX file to Zimbra could create duplication if the file contains copies of the same message.
  • Importing the file into Zimbra could lead to disturbance in the folder hierarchy.
  • Your Zimbra mailbox is almost full and there is no space to save another data.
  • If the data in the file and the Zimbra data are the same. This will result overwritten issue.

Therefore, there are several issues you may face in the importing process. To avoid them, try this method.

How to Secure Zimbra Mailbox?

To make your process much easier, use SysTools IMAP Backup Tool. With this tool, create a backup of your Zimbra mailbox. In this, you will get several options to choose a file format like PST, PDF, EML, etc. Also, by doing this, you can access your data from other platforms.

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Why Take a Backup of Zimbra Emails?

By using the above software, you can easily take a backup of your Zimbra mailbox. By doing this, you will get many benefits, such as.

  • Safeguard your Zimbra mailbox from any duplication or overwritten problems.
  • If your file is corrupted and you lose your existing Zimbra data. You can easily retain the lost items.
  • Your Zimbra Mailbox is almost full, and you need space for the new files. In that case, use the software to move your Zimbra file to a safe place. so that you can easily import the files.

Hence, take a backup of your account before the procedure.

Final Words

If you are having a problem importing MBOX to Zimbra. Then, this article provides you with ways that you can easily follow and move your files. Here, I have explained two methods that can easily import the files. Along with this, I also discuss the problems when you are moving a new file to an existing Zimbra mailbox. And a solution to resolve them.

Commonly Asked Questions

Q. Is the MBOX file compatible with the Zimbra web client?
No, you cannot directly open an MBOX file in the Zimbra web client. To access the file, you have to use a third-party email application to move the file to your Zimbra account.

Q. How to check if the MBOX file is corrupted before importing?
To know if the MBOX file is corrupted by opening it in Thunderbird. If the emails are properly loaded, no missing messages or formatting problems. So, your file is not corrupted.

Q. Is there a command-line option to move MBOX to the Zimbra server?
No, the command-line tool zmmailbox does not move the MBOX file to Zimbra. To do that, you have to first convert MBOX to TGZ format and then use the command line to import the file.

  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.