An email is a document that is composed of the following structure
It's a network message known as:
The format is described in RFC822 Internet Message Format.
The email can be found after the DATA or BDAT smtp command in the SMTP protocol. ie this is the message.
Delivered-To: [email protected]
Received: by 2002:a05:6504:519b:0:0:0:0 with SMTP id z27csp820130ltq;
Fri, 12 Jun 2020 12:08:19 -0700 (PDT)
X-Google-Smtp-Source: ABdhPJzM66OAweomG9vKiJ5AWPP0ohl2MoXV5gWEkK6qjMEbbi7zYkA0YtlEAlN2q+zIayLrmH2K
X-Received: by 2002:a7b:c186:: with SMTP id y6mr410599wmi.82.1591988898906;
Fri, 12 Jun 2020 12:08:18 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1591988898; cv=none;
d=google.com; s=arc-20160816;
b=TCI6uKqvNsf837MdYuidYRQJXym4/du4gMiXIDqrfvkJodVd7CFPK3cOoawD8OiT8E
Hm2dTBOVIOpZElxKAlfFkiUorasnIgTgfSV4GmdmRyRPnb+9kieuIVntFHVYfn1gmQU9
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8vdzg04mBmpH3AoB2todjh8TpiDKCJJDVeC6v/bXNZ02T4lL9KRPhr4ZjPQQ/ocS07Ez
AUGZqgKMSXWswq8Lj7avngjwl5a1yoEb+07pGzJL/lOT9BeWSECwfnC1vexkGVXB/pyR
XZVw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
h=from:message-id:content-transfer-encoding:mime-version:user-agent
:subject:to:date:dkim-signature:dkim-filter;
bh=WBggpZrfs7F0OzQkyE7LiZPHyfFFhl7N4CNav2f5YVw=;
b=0B+TDvc+p0JWW/204sbMHyWdqPQDdEW+3lmKdn2aZu9vuS8Tc1tQmnd3eoEMhRFi0Z
Vn3LIIBIYnX1oaYlkOWmPuQ5sczzPUxVQbfip0MQ0GDakNwOQJKy+jBMeV3bc+T/KRN3
yJjFrvfJWwLBoQVIC+lkJVhY3Uj92SM2W7aTL3U3N4P5vvcwIzl1OLEm+aB5kNPbmIj9
u0Im/2y60y8IOXx2Kh3lrDdJeyFAmrsng5XZDQjL6rM80VA1zm0kA/GUOPgcJE72A5N4
oBivn/1DdD7piqw3EP6X4u/09owyOvHZW1ENU1GoAFVqPRMvw1s6WF4+eng0j+BensZu
VeyQ==
ARC-Authentication-Results: i=1; mx.google.com;
dkim=pass [email protected] header.s=vps748761.ovh.net header.b=ByN4Iw4U;
spf=pass (google.com: domain of [email protected] designates 164.132.99.202 as permitted sender) [email protected]
Return-Path: <[email protected]>
Received: from server01.bytle.net (server01.bytle.net. [164.132.99.202])
by mx.google.com with ESMTP id v21si7421752wra.299.2020.06.12.12.08.18
for <[email protected]>;
Fri, 12 Jun 2020 12:08:18 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates 164.132.99.202 as permitted sender) client-ip=164.132.99.202;
Received: by server01.bytle.net (Postfix, from userid 0)
id 3E16E1FBE8; Fri, 12 Jun 2020 21:08:18 +0200 (CEST)
DKIM-Filter: OpenDKIM Filter v2.11.0 server01.bytle.net 3E16E1FBE8
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytle.net;
s=vps748761.ovh.net; t=1591988898;
bh=WBggpZrfs7F0OzQkyE7LiZPHyfFFhl7N4CNav2f5YVw=;
h=Date:To:Subject:From:From;
b=ByN4Iw4U9RP8bzaPK0n3HJbFlvI60ett+V9pkoli+UNtdAcSdq/ANc3hL71PzjrT4
3yyTjK3MC5e2f/k+BAnIaAgnradAK/1CbMF4vMZVD6WoVIx7KTZlfWsW39Ir8PhqYQ
4TKvPpDUx8ToxUz1gwQlxJoExYW3McXJ2WdvUAf8=
Date: Fri, 12 Jun 2020 21:08:18 +0200
To: [email protected]
Subject: Without hosts dkim test !
User-Agent: Heirloom mailx 12.5 7/5/10
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <[email protected]>
From: [email protected] (root)
cc: [email protected]
bcc: [email protected]
This is the body of the email
where:
An email has:
where:
The mime message are stored in a mailbox
To see the text format of the email (the original), you can ask it in the email menu