Internet e-mail message format

Writable

Defined in RFC5322 the Internet Message Format provides a syntax for text messages that are sent among computer users, within the framework of "electronic mail". Consisting of header fields and an optional body, encoded using ASCII characters. The Internet Message Format (*.eml) is a format used by numerous email systems. The format does not prevent the use of alternative formats for storage of electronic mail on those systems.

Identify it

Extensions	`.eml`
MIME types	`message/rfc822`
PRONOM	`fmt/278`
Wikidata	`Q11198294`
Library of Congress	`fdd000393fdd000388`

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Open it

RoundcubeOpen sourcewrites · GNU General Public License, version 3.0
Emailchemyreads and writes
Aid4Mailreads
Becky!reads
DArcMailreads
Forensic Toolkitreads
Scribe Mailreads

Convert it

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Sources

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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