RFC 4155 (2005) The application/mbox Media Type : mbox extension, but this is not required nor expected.Įach message starts with the four characters “From” followed by a space (the so-called “From_ line”). It was first implemented in Fifth Edition Unix. The first one is an mbox file (a text file without extension), which is a standard format to store email content.Īll messages from a mailbox folder are concatenated and stored as plain text in a mbox file.

Unless you explicitly use optional support for Maildir which allows a single unique file per email (using the EML data format), Thunderbird stores emails content in two distinct files.

Two of the most common are mbox files and Maildir directories. There are several ways to store emails on disk. How does Thunderbird emails storage work ? Mozilla’s most known products include the Firefox web browser and Thunderbird e-mail client. The project took its name “Mozilla”, after the original code name of the Netscape Navigator browser. He developed the Unix release of Netscape Navigator 1.0 and later, Netscape Mail, the first mail reader (or Usenet reader) to natively support HTML. He was a founder of, personally registering its domain name on the day of Netscape’s open source announcement and helping design and run the organization through its first year.

Mozilla (stylized as moz://a) is a free software community founded in 1998 by members of Netscape.

Dat files reader thunderbird