EML is an actively used text data format created in 1974. Mbox is a generic term for a family of related file formats used for holding collections of email messages, first implemented for Fifth Edition Unix. All messages in an mbox mailbox are concatenated and stored as plain text in a single file. Each message starts with the four characters "From" followed by a space (the so named "From_ line") and the sender's email address. Read more on Wikipedia...

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  • EML ranks in the top 20% of languages
  • the EML wikipedia page
  • EML first appeared in 1974
  • file extensions for EML include eml and mbox
  • See also: rfc, unix, mime
  • I have 31 facts about EML. what would you like to know? email me and let me know how I can help.

Example code from the web:

From MAILER-DAEMON Fri Jul  8 12:08:34 2011
From: Author <author@example.com>
To: Recipient <recipient@example.com>
Subject: Sample message 1

This is the body.
>From (should be escaped).
There are 3 lines.

From MAILER-DAEMON Fri Jul  8 12:08:34 2011
From: Author <author@example.com>
To: Recipient <recipient@example.com>
Subject: Sample message 2

This is the second body.

Example code from Linguist:

Return-Path: <nobody@example.org>
To: Mario Zaizar <nobody@example.local>
Subject: Testing Mario Zaizar' MIME E-mail composing and sending PHP class: HTML message
From: nobody <nobody@example.org>
Reply-To: nobody <nobody@example.org>
Sender: nobody@example.org
X-Mailer: http://www.phpclasses.org/mimemessage $Revision: 1.63 $ (mail)
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="652b8c4dcb00cdcdda1e16af36781caf"
Message-ID: <20050430192829.0489.nobody@example.org>
Date: Sat, 30 Apr 2005 19:28:29 -0300


--69c1683a3ee16ef7cf16edd700694a2f
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

This is an HTML message. Please use an HTML capable mail program to read
this message.

--69c1683a3ee16ef7cf16edd700694a2f
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<title>Testing Mario Zaizar' MIME E-mail composing and sending PHP class: H=
TML message</title>
<style type=3D"text/css"><!--
body { color: black ; font-family: arial, helvetica, sans-serif ; backgroun=
d-color: #A3C5CC }
A:link, A:visited, A:active { text-decoration: underline }
--></style>
</head>
<body>
</body>
</html>
--69c1683a3ee16ef7cf16edd700694a2f--

--6a82fb459dcaacd40ab3404529e808dc
Content-Type: image/gif; name="logo.gif"
Content-Transfer-Encoding: base64
Content-Disposition: inline; filename="logo.gif"
Content-ID: <ae0357e57f04b8347f7621662cb63855.gif>
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==

--6a82fb459dcaacd40ab3404529e808dc

Example code from Wikipedia:

From MAILER-DAEMON Fri Jul  8 12:08:34 2011
From: Author <author@example.com>
To: Recipient <recipient@example.com>
Subject: Sample message 1

This is the body.
>From (should be escaped).
There are 3 lines.

From MAILER-DAEMON Fri Jul  8 12:08:34 2011
From: Author <author@example.com>
To: Recipient <recipient@example.com>
Subject: Sample message 2

This is the second body.

Last updated December 10th, 2019

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