EML File Extension
E-Mail Message
- File Type eml
- Developer Microsoft
- Popularity
- Application Microsoft Outlook
- Category Web Files, Email Program Files
- Format Text and Binary
What is a EML file?
Files with the EML extension are associated with E-Mail Message and are categorized as Web Files and Email Program Files, making up 333 files.
The E-Mail Message (EML), created by Microsoft, is one of file format they developed, and they also built 242 programs to support them.
EML files are compatible with various operating systems, including Windows, Mac OS and Linux. When working with EML files, you can rely on 17 programs, including Microsoft Outlook, Microsoft Outlook Express and Mozilla Thunderbird.
MIME types
- message/rfc822
Programs that support EML files
Windows
Mac OS
Online Services
How to open a EML file?
If you can’t open a EML file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
Microsoft Outlook, Microsoft Outlook Express and Mozilla Thunderbird are among the most widely used programs for handling EML files. To install the most up-to-date edition of Microsoft Outlook, visit the official Microsoft website. You can download the build that works across all operating systems.
After installing, your OS should instantly open EML files with Microsoft Outlook.
Setting Microsoft Outlook as default EML viewer
Change the default app for a file type in Mac
- Initiate a right click or use Control + left click on the desired EML file to open a menu where you can select various actions;
- Choose "Open in Application" and click "Other";
- Look towards the bottom of the window, where you will find the "Enable" menu. "Recommended programs" will be the default selection;
- Choose "All Programs" in this menu and search for Microsoft Outlook. Check the box next to "Always open in app" to set it as the default option.
Change default programs in Windows
- Take the first step by right-clicking on your EML file. Next, select "Open With" and then choose "Choose another app" from the available options;
- Choose Microsoft Outlook from the available applications listed in the pop-up window to set it as the default application to open your EML file;
- Be sure to check the "Always use this app" checkbox, and then click "OK" to confirm your selection.
How to edit a EML file?
To modify EML files, it is necessary to install dedicated software that lets you open and edit web files. Online EML editors generally offer fewer tools compared to programs designed for E-Mail Message.
Best EML editors 2026
Based on the specified criteria, here is a list of EML editors that may fit your requirements.
| EML Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Apple Mail | Apple | Mac OS | 4.8 out of 5 (38 reviews) |
| Microsoft Outlook | Microsoft | Windows, Mac OS | 4.8 out of 5 (43 reviews) |
| Windows Mail | Microsoft | Windows | 4.8 out of 5 (40 reviews) |
| Microsoft Outlook Express | Microsoft | Windows | 4.4 out of 5 (39 reviews) |
| Windows Live Mail | Microsoft | Windows | 4.3 out of 5 (41 review) |
| Mozilla Thunderbird | Mozilla | Windows, Mac OS, Linux | 4.2 out of 5 (41 review) |
Convert files to and from EML
When a EML file is not easy to work with, converting it to formats like JPG, JPEG, PDF, PS or other comparable types may help.
It is important to understand that converting a EML file might limit certain functions, but this conversion is usually reversible.
Convert EML to other file formats
Tips and tricks to solve problems with EML files
Problematic EML files can usually be resolved by making small changes in your software. See the tips below to help fix common issues.
Are there any techniques or tools available to repair a damaged EML file?
In a data recovery program, open the damaged EML file and select the "Repair" menu option. Wait for the recovery process to finish as it will automatically restore the damaged web files.
How do I know if my EML file has been damaged?
The signs of corrupted EML web files can manifest as:
- Error alerts occur when actions are performed on the file;
- The file shows slow performance when edited in Microsoft Outlook;
- The file encounters problems during the opening process or shows error indications;
- An unexplained increase in the size of the EML file;
- The file causes Microsoft Outlook or other software to hang or crash during various operations;
What factors contribute to Microsoft Outlook crash?
Lack of software updates is a possible reason behind Microsoft Outlook crash. Keep your Microsoft products up to date by installing the latest updates.
Restarting your computer is an essential troubleshooting step that can resolve many common problems. It is recommended to restart your computer before making any changes to the software settings.