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Written By Abhilash Dogra
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Updated on November 25th, 2025
Summary: When users backup, and email account switches often lead to a collection of old emails stored in EML files. While they are very convenient to store, EML files become a nuisance when you need constant access to emails from multiple devices. But when you choose to import EML to Office 365 is a good solution. However, the manual techniques to migrate EML files can be complex. Bulk EML imports can result in failed transfers, loss of email attachments, broken folder hierarchies, and missing emails. To help you, we have a detailed manual and automated solutions, MacGater EML Converter, for a safe EML to Office 365 migration.
Reasons to migrate your old EML files to Office 365:
There are many ways for the conversion, which include:
If you only have a few EML files, you can use Outlook on your desktop as a bridge:
If you’re looking for a simple way to move your emails, the MacGater EML Converter for Mac can help. Along with that, you can also save and convert EML to EMLX, PST, MBOX, etc. The tool also supports the direct transfer for email clients like Gmail, iCloud, Yahoo, G Suite, and other IMAP accounts. It keeps your folders in order, shows a preview of messages before migration, and even removes duplicate emails. Best of all, it handles large batches of files smoothly on any macOS version.






In this blog, the manual methods can work for small data sets, but they cannot work when the data is in a bulk of emails. When the data is in bulk or for the business, a reliable utility like MacGater EML Converter is used for faster and secure import of EML to Office 365.
Ans. You can open .EML files using email clients like Windows Mail, Thunderbird, or Apple Mail. They can also be viewed in most web browsers by dragging and dropping the file.
Ans. For a large number of emails, the most reliable option is to use a professional migration tool such as MacGater EML Converter. It supports bulk migration and saves time compared to manual methods.
Ans. The easiest method is to use an automated utility like the MacGater EML Converter that directly uploads EML files to Office 365. This avoids the lengthy steps of manual migration and ensures data safety.
Ans. Using the MacGater EML Converter tool. Follow the simple steps:
1. Download the MacGater EML Converter on the device.
2. Browse and select EML files from your computer.
3. Preview the content and attachment by the advanced panel.
4. Select Office 365 from the email clients option.
5. Log in with the Office 365 credentials to proceed..
6. An advanced filter can be applied
7. Click on convert.
About The Author:
Abhilash Dogra is a dedicated IT professional with more than 3 years of experience and has been a key member of Aryson Technology for the past 5 years. His expertise includes email migration and data recovery, with a strong focus on technologies such as MS Outlook and Office 365. In addition to this, Abhilash explores front-end technology and software development. He holds a Bachelor's degree in Computer Technology.