MailViewer is a GNOME application that allows users to read and decode .eml and .msg files (email files) without having to install any additional software or create an account.
It provides a graphical interface for easy navigation and rendering of email content, including attachments, HTML, and plain text.
This is free and open source software.
Features include:
- Open and view .eml or .msg files: Display the email’s subject, sender, receiver, and content.
- Decode email attachments: View and/or save attachments.
- Support for HTML and plain text emails: Render emails in both formats (if available).
Website: github.com/alescdb/mailviewer
Support:
Developer: Alexandre Del Bigio
License: GNU General Public License v3.0

MailViewer is written in Rust. Learn Rust with our recommended free books and free tutorials.
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