Software & Apps File Types Open EML Files in Windows There are several ways to open EML files on a Windows computer by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on May 16, 2019 NordWood Themes / Unsplash File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email Did someone email you an EML file that you don't know how to open? Do you have old EML files on a backup drive that you need to open in a specific program? When you want to open an EML file in Windows, there are a few things you can try. You can either open the email program first and then open the EML file, or you can change a specific setting on your computer so that double-clicking an EML file opens it in the program of your choice. Instructions in this article apply to Windows 10, Windows 8, and Windows 7. Manually Open EML Files in Windows If you have more than one EML viewer installed on your computer and want to choose which program opens it, here's how to open the EML file: Open Windows File Explorer and locate the EML file you want to open. Right-click the EML file and select Open With. Select Mail or Windows Mail. The file opens in the Windows email program. Change the Default Program to Open EML Files in Windows Windows gives you the option to pick which program will open an EML file when you double-click it. This method is useful if you always want the EML file to open in the same program. In the Windows Search box, enter default. Select Default App Settings or Default Programs. Select Choose Default Apps by Type or Associate a File Type with a Program. In the list of file types, select EML. In the list of programs, choose Mail or Windows Mail to set it as the default. There may be several programs on your computer that open EML files. For example, you can use Mozilla Thunderbird to open the EML file instead of a Windows email client.