Importing MBOX emails to iCloud, along with attachments, can be done by following a few key steps. While iCloud doesn't natively support importing MBOX files, there are workarounds you can try to transfer your emails with attachments.

Method 1: Using Apple Mail (Manual Approach)

1. Convert MBOX to Apple Mail Format: Use an MBOX to Apple Mail converter or simply import the MBOX file into Apple Mail.
2. Open Apple Mail: Once the MBOX file is imported into Apple Mail, open the Mail app on your Mac.
3. Add iCloud Account: Ensure your iCloud account is configured in the Apple Mail settings.
4. Drag and Drop Emails: From Apple Mail, drag the emails from the imported MBOX folder to your iCloud inbox. This will upload them to your iCloud email account, keeping the attachments intact.
5. Sync with iCloud: After the import, iCloud will sync the emails with attachments across all devices linked to your iCloud account.

Method 2: Using a Third-Party Tool

You can also use third-party software designed for importing MBOX files to iCloud, such as FRT Freeware MBOX Converter (https://www.filesrecoverytool.com/mbox-converter.html) or other reliable email migration tools. These tools automate the process and ensure a smoother transition, especially when dealing with large MBOX files or complex attachments.

The most effective method for importing MBOX files to iCloud with attachments is for users to utilize an automated process. The DailySoft MBOX to IMAP Migrator is an ideal solution for easily importing MBOX files with attachments to iCloud, thanks to its advanced function that can import bulk or individual MBOX files with attachments. The GUI is easy to navigate, allowing users to perform tasks effortlessly without the need for additional tools. The users must ensure that when they upload MBOX files, the files are healthy and not corrupted or orphaned; otherwise, the software declines the tasks. The software is simple to use and operates independently on all Windows operating systems. The trial version is also available; users must try it before purchasing. 

Read More: https://www.dailysoft.org/mbox/imap/

To import MBOX emails to iCloud with attachments try Advik MBOX Converter. the software can directly upload MBOX to iCloud without any external help. It can transfer multiple MBOX files at once. It preserves all email attributes during the process. Apart from this it also provides various advanced filter options to import selected emails based on date range, to, from, subject, etc.

To Know More Visit Here: https://www.adviksoft.com/blog/import-mbox-to-icloud/

Are you looking for a way to import MBOX emails & attachments to iCloud? So, you need to utilize a specialized tool rather than a hard or risky way because the manual method is associated with lots of limitations or restrictions and most of these users avoid using this method. For a safe and secure process, you can utilize the MailConverterTools MBOX Converter Tool. With the help of this application program, you can easily import your bulk of MBOX files to your iCloud account in just a few simple steps. Also, this software GUI is so easy to use, that users can easily utilize this program in their operating system. Additionally, this software is compatible with all versions of MS Windows.

To know more: https://www.mailconvertertools.com/mbox/

There are numerous online methods available for importing MBOX emails into iCloud, but I assure you that I have a dependable solution. Consider using the advanced solution try the SameTools Cloud Importer Tool, which is based on new technology for importing MBOX emails to iCloud with attachments`. It is beneficial for non-technical users, allowing them to easily operate its user-friendly interface without requiring technical assistance. For processing tasks, the software requires your iCloud login details and gives a user the result orientation that they need. The utility is compatible with all Windows OS versions. 

Read More: https://www.sametools.com/cloud/importer/