電子郵件結構包含郵件封套(Mail Envelope)與郵件內容(Mail Content)

郵件內容包含表頭(Header)與本文(Body)。兩者用一個空白行區隔。

郵件格式：

Return-Path: <from_bestlong@seed.net.tw>
Delivered-To: to_bestlong@bestlong.idv.tw
Received: from seed.net.tw (sn13.seed.net.tw [139.175.xxx.xxx])
    by ms1.bestlong.idv.tw (Postfix) with ESMTP id 23F371B072F
    for <to_bestlong@bestlong.idv.tw>; Sat, 21 Feb 2009 14:27:47 +0800 (CST)
Received: from [123.204.xxx.xxx] (port=4012 helo=PC1)
    by seed.net.tw with esmtp (Seednet 4.23:1)
    id 1LalL0-000Fwr-0g
    for to_bestlong@bestlong.idv.tw; Sat, 21 Feb 2009 14:27:46 +0800
Return-Receipt-To: from_bestlong <from_bestlong@seed.net.tw>
Reply-To: <from_bestlong@seed.net.tw>
From: from_bestlong <from_bestlong@seed.net.tw>
To: "'to_bestlong'" <to_bestlong@bestlong.idv.tw>
Subject: mail subject
Date: Sat, 21 Feb 2009 14:27:36 +0800
Message-ID: <20090221022901.E0C101B0724@seed.net.tw>

This is Mail Content

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• TWIG http://informationgateway.org/
• SquirrelMail http://www.squirrelmail.org/
• OpenWebMail http://openwebmail.org/