File Type E-Mail Message IconE-Mail Message
File Format Standard (developed by Microsoft)
Usage Referenced by an application; not meant to be opened manually; may run a program or script when opened
Popularity ★ ★ ★ ★ ★  Popular

The EML format is used to store e-mail messages for Outlook Express and several Unix-based e-mail programs. Each EML file is a standard plain text file that includes the e-mail header information and the body of the message.

Info About Microsoft Outlook Express

Outlook Express is an e-mail client that was included with Internet Explorer and standard Windows installations. It includes basic e-mail composition and organization features, but does not include all the features of the full version of Outlook.

The last version of Outlook Express was included with Internet Explorer 6 and has since been replaced by Windows Live Mail.

Open With

IconMicrosoft Outlook

IconMicrosoft Internet Explorer

IconMozilla Thunderbird


IconMicrosoft Outlook for Mac

IconApple Mail

IconMozilla Thunderbird


IconMozilla Thunderbird

IconMozilla SeaMonkey


Updated July 21, 2009
Information from the PC File Extensions Reference