How to Import MBOX to iCloud Mail – 3 Easy Methods
What Is an MBOX File and Can iCloud Import It Directly?
An MBOX is a file format that may hold multiple emails together in one place. Apps such as Apple / Mac Mail, Thunderbird, and Google Takeout all use this format.
The issue is, iCloud Mail does not know how to open an MBOX file on its own. There is no “import” button for it anywhere in iCloud. Therefore, if you need your old MBOX mailboxes inside your iCloud account, you need to move them there using another app, or software designed for this same job.
In this guide, we will show you three ways to do it – two free methods using the mail client, and one paid tool for people with a lot of emails or large attachments to move.
Why Import MBOX to iCloud ?
MBOX email files offer great functionality when stored locally on your desktop. Their usability is enhanced when MBOX files are imported into iCloud, like email services.
- Better Accessibility: MBOX files are easily accessible if you are configured with an account like Thunderbird. However, if you are not, you may face issues. Hence, in such a scenario, syncing them with iCloud is the best option.
- Compiling Email Data: iCloud offers a convenient way to centralize your email management alongside other Apple services like iCloud Drive, Contacts, Calendar, and Notes.
- Easy Integration with Apple Services: iCloud is strongly integrated with Apple’s ecosystem, including iOS devices (iPhone and iPad), Mac computers, and even Windows computers. Importing MBOX files into iCloud ensures that your email data is readily available and synchronized across all your Apple devices.
Users also add MBOX to iCloud Mail when migrating email services, for better cloud security, and restore locally stored MBOX data into the iCloud Mail account.
Method 1: Import MBOX to iCloud Using Apple Mail (Free, macOS)
Mac/ Apple Mail natively supports MBOX format. Thus, importing .mbox files to an iCloud email account is simple. The whole import process is carried out in two phases:
Phase 1: Add MBOX Files in Apple Mail
- First, launch the Apple Mail application on your macOS.
- Navigate to the File and select Import Mailboxes
- In the dialog box, choose Files in MBOX format.
- Click Continue.
- Browse and select the .mbox file and click Choose.
- The import process will begin, and the MBOX file will appear under the On My Mac section as a new mailbox.
Phase 2: Configure iCloud in Apple Mail and Import MBOX
- Navigate to System Preferences and select Apple ID & iCloud
- Make sure Mail is checked.
- Your iCloud account will appear in the sidebar in Apple Mail.
- Next, create a new folder in your iCloud account
- Next, open the MBOX file in the On My Mac section
- Select All emails (Cmd+A)
- Next, paste or drag and drop it into the newly created folder in the iCloud account.
This is how to import MBOX in iCloud Mail manually using native tools. This method is suitable for most professionals.
Apple Mail Method — Pros and Cons
| Pros | Cons |
|---|---|
| Free and no extra software needed | Works on Mac only |
| Best for a few emails | Not suitable for large MBOX files |
| Uses an app most Mac users already have | Folder structure is not kept automatically |
| No sign up or account needed for the tool itself | Attachments over 20 MB may fail to upload |
Method 2: Import MBOX Files to iCloud Using Thunderbird
Thunderbird, along with the ImportExportNG add-on, is a free and alternate way to upload MBOX to iCloud free of cost. Although this method also works on Mac, experts recommend using it as an alternative way on Windows.
Phase 1: Import the MBOX File into Thunderbird
- Install the Mozilla Thunderbird application on your desktop.
- Configure your iCloud email account in Thunderbird.
- Go to the Navigation Menu >> Themes & Extension.
- Search for ImportExportNG and Add.
- Go to Local Folders and right-click.
- Choose ImportExportNG >> Import >> MBOX.
- Select the MBOX files and press Open.
Phase 2: Move the Imported Folder to iCloud
- Right-Click on the newly imported folder and choose Move To.
- Select the iCloud account as the destination to import MBOX to iCloud.
Tip: You can also create a new folder in your iCloud account to specifically keep imported MBOX files for better organization.
Note: When adding an iCloud account to Thunderbird (a non-native email client), use App-Specific Password.
Thunderbird Method — Pros and Cons
| Pros | Cons |
|---|---|
| Free to use | Needs an extra add on (ImportExportNG) |
| Works on both Windows and Mac | Takes more time to set up than Apple Mail |
| Good for a small to medium number of emails | Needs an app specific password |
| Folder structure is not kept automatically |
Method 3: Import MBOX into iCloud Using a Dedicated Tool
4n6 MBOX Converter is the simplest option to import MBOX files into an iCloud account while preserving attachments and folder structure. With this software, you can transfer multiple MBOX files into an iCloud account at once, without having to deal with manual account configuration and email client dependency.
The tool is available in a free trial version. This version is ideal for those who want to test the tool before purchasing the licensing version. Install the trial version to have a better understanding of the tool.
Step-by-Step Guide to the Import Process
- Download, install, and start the software to import MBOX to iCloud.
- Now, click the Open tab, choose Email Data File. Select MBOX Files and select the Choose Files or Choose Folder option.
- The software instantly loads all the files on the left panel.
- Then, click the Export tab and select IMAP in order to import MBOX file to iCloud.
- Enter your iCloud email address and password. After that, click the Save button to import MBOX files to iCloud.
That’s it! The software will verify the credentials and will start the data transfer automatically. It will take only a few minutes and once the process is done, you will be notified.
Expert Tip: Ensure that you have enough storage space in your iCloud account. A free iCloud account with an Apple ID only has 5GB of storage.
Dedicated Tool Method — Pros and Cons
| Pros | Cons |
|---|---|
| Directly move MBOX files into iCloud | Works on Windows only |
| Move unlimited files in a single operation | Paid |
| No additional email client needed | |
| Preview files before migration | |
| Preserve attachments and folder structure | |
| Supports multiple filters for selective data export | |
| Integrated with search options |
Which Method Should You Use?
| Factor | Apple Mail | Thunderbird | Professional Tool |
|---|---|---|---|
| Cost | Free | Free | Paid (Trial version available) |
| Works on | Mac only | Mac and Windows | Windows |
| Good for | A small number of emails | A small to medium number of emails | Large MBOX files |
| Keeps folder structure | Not automatically | Not automatically | Yes, automatically |
| Handles large attachments | Fail above 20MB | Fail above 20MB | Yes |
| Setup time | A few minutes | A bit longer, needs an add on | A few minutes |
| Best if… | You already use a Mac | You are on Windows | You want to move thousands of emails at once |
Common Problems When Importing MBOX to iCloud
My import stopped partway through
This may happen with large MBOX files. Apple Mail and Thunderbird may both slow down or freeze if a file is too big. You can try to split MBOX file into smaller parts. Else, you may use a converter tool that is designed to handle large files.
I am getting a login error when I try to connect to iCloud
If you are using an app that is not made by Apple, like Thunderbird, iCloud will not accept your normal password. Therefore, you need to create an app specific password from your Apple ID account settings and use that instead of your regular password.
Some of my attachments are missing after the import
iCloud and IMAP servers generally reject attachments over 20 Megabytes. So, if your emails have large files attached, check the size before you import. A third party professional converter tool usually handles this better than a manual import.
My emails are all there, but my folders are gone
This is a known limit of the manual methods. Apple Mail and Thunderbird do not automatically move your folder structure over. You will need to recreate your folders in iCloud and sort the emails yourself. Or, use a tool that maintains folder structure for you.
iCloud says I am out of storage
A free iCloud account only comes with 5 GB of space. You need to check your available storage first in your iCloud settings before you start the import.
Frequently Asked Questions
Can I import MBOX to iCloud mail iPhone?
No, you cannot directly import MBOX files into iCloud via iPhone; you need to use a desktop email client like Mac Mail, Thunderbird, or a dedicated tool.
Will importing MBOX files into iCloud affect my existing data?
Importing MBOX files into iCloud does not affect your original data. Your current emails and settings will remain intact.
Is it possible to import old MBOX emails directly via iCloud Webmail?
No, in iCloud Mail’s Webmail interface, there is no native option to import MBOX.
Can I export MBOX files to iCloud Mail for free?
Yes. There is a free version of the software that you may use to import MBOX mailboxes to iCloud Mail for free.
In Conclusion
You must import MBOX data before you can access it on iCloud. As a result, we have offered you the best procedure. A specialized tool is the best way to import MBOX to iCloud. The tool is entirely safe and secure and offers a trial version for the user’s convenience.
