Every Mother

I use gmail. How do I open an .eml file?

I

Today, a client who uses Microsoft Outlook attached an email to our email thread. In Gmail (Email for Work edition), it came through as an attached .eml file.

What attached emails look like in Gmail.

I downloaded the .eml to my desktop, but by default, opening it would try to initiate Mail (which I don’t use) or Outlook (which I also don’t have set up). All I want to do is open and read the email. The easiest way to do so?

Open your .EML file on your Mac in a Browser

Simply drag the EML file into my browser. Any browser tab will render the .eml file.

Security note: Always scan .eml files. Because they are essentially containers, they can sometimes house malicious scripts or phishing links that bypass basic surface-level email filters.

Digging Deeper

Why this happens

Outlook uses a proprietary format (“Item”) for attachments, but when it leaves the Microsoft ecosystem, it’s often converted to a .eml file (the standard MIME RFC 822 format). Since Gmail doesn’t always have an “inline” viewer for nested .eml files, it treats it like a cold, hard piece of external data.

About the author

Kelly Barkhurst

Designer to Fullstack is my place to geek out and share tech solutions from my day-to-day as a graphic designer, programmer, and business owner (portfolio). I also write on Arts and Bricks, a parenting blog and decal shop that embraces my family’s love of Art and LEGO bricks!

By Kelly Barkhurst February 25, 2026

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