How to Convert OLM File to MBOX with all the Attachments for Free

“I have many OLMs saved from different Mac machines. Is there any way to batch convert them to MBOX with attachments and no loss?”

Convert OLM into MBOX, But Incompatibility?

OLM is a proprietary export format used only by Microsoft Outlook for macOS devices. An OLM file is not readable in a version of Outlook for Windows (or vice versa). It is because Windows Outlook is locked inside Microsoft’s ecosystem.

Easier to use, more widely accepted MBOX, on the other hand, is used by dozens of email clients such as Thunderbird, Apple Mail, and even Google Takeout! This file format is universally recognized and suited for all archiving, sharing, and other purposes.

One of the problems to overcome is that there are no native utilities on Mac or Windows to convert OLM into MBOX directly. And even fewer that will do so to preserve attachments, embedded images, or nested folders adequately. So, we will discuss the absolute ways, but first, see some tips to export OLM files into MBOX efficiently:

• Always scan the OLM files before converting to ensure that you do not export corrupted content.
• If converting very large OLM files, always consider splitting them before importing into any MBOX client such as Thunderbird.
• Use filters if you do not wish to export older emails to reduce conversion time and output size.

Native Methods to Convert OLM File to MBOX

As we know that this is certainly not a “Save As” activity. So, we brief an easy manual method and a reliable professional software for a swift conversion. Go through the below given step by step processes and opt for one that is ideal as per yor preferences.

Free Convert Mac OLM File to MBOX

All Mac users can simply continue with these steps. But you need to have both Outlook for Mac and Apple Mail on your macOS for this method. Steps are:

How Users Set Up IMAP Email Account

Adding any mail account that is an IMAP-based account to Outlook for Mac (unlike Exchange) is really intended to work.

1. First, create a new mailbox in the IMAP account. Create it after you have synced the account with Mac Outlook.
2. Then, copy all of the emails from the OLM mailboxes into it.

Sync Emails to the Server

3. Just wait until all of the data has synced with the IMAP server. Depending on the mailbox size, this could take some time.

Open Apple Mail and Sync Account

4. After the sync is done, open Apple Mail on your Mac. Furthermore, set up the same IMAP account. 
5. Finally, you can then see the folder and its emails within your Mac Mail.

Convert OLM File to MBOX

6. Later, in Apple Mail, right-click the folder and opt for Export Mailbox.
7. In the end, all the folders as .mbox files get saved on your Mac.

Note: You can also simply choose to drag and drop (.olm) files from Mac Outlook on your desktop. It automatuiclally import OLM files into MBOX. Further, if you wish to access them on Windows, configure the same IMAP account in your Thunderbird or use an external drive to transfer the resultant MBOX files from Apple Mail.

Shortfalls of the Manual Method

Despite being free, there are some limitations that users cannot avoid when using this method:

• You can only transfer emails, i.e., this process does not cover calendar, contacts, or tasks.
• When you manually export email via IMAP, it does not protect the folder structure across folders.
• You don’t have any bulk or selective email conversion options across different OLM files.
• Users also need stable internet without interruptions and a little technical knowledge for an IMAP connection.

To avoid all these limitations and perform a hassle-free conversion from Outlook for Mac to a MBOX file. You need to proceed with the following section to know about the expert-recommended solution. 

Automatically Convert OLM file to MBOX

Manual options are boundless, particularly for users with multiple accounts or individuals who don’t have Outlook or Apple Mail configured. For that reason, utilizing a professional OLM Converter makes the process easier and removes these roadblocks. It is compatible with Mac & Windows platforms, while maintaining all existing attachments, inline images, and HTML formatting. Furthermore, all data can be batch converted with multiple OLM files at the same time with advanced filtering. Thus, it is an all-in-one solution to organize and manage OLM for any client’s MBOX file.

Guide: How to Convert OLM into MBOX

1. Download and install the OLM to MBOX Converter on the machine. 
2. Then, add multiple OLM files or a folder with OLM files in it. Click Next.
3. View and select the folders you want (Inbox, Sent, etc.) and tap Next. 
4. Further, select MBOX as your output format and apply email filters. 
5. At last, give a path, click Convert, and let the tool do the rest.

This is how straightforward the OLM file to MBOX conversion process is without any kind of trouble.

Conclusion 

If you are trying to convert OLM file to MBOX, whether for migration, backup, or email client. You can switch to manual methods for lightweight conversions on Mac. But it falls short for anything that is large-scale or needs automation. Whereas, a specialized tool ensures data integrity, security, saves time, and works across all platforms. Henceforth, it simplifies complex bulk migrations in a few simple clicks.

Frequently Asked Questions

About The Author:

Edwin Stark

Edwin Stark is a Technical Content Writer who specializes in writing about databases, e-mail recovery, and e-mail migration solutions. He loves researching and developing content that helps database administrators, organizations and novices to fix multiple problems.

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