From: <address> To: <address> Date: <RFC 3339 second precision> Message-ID: <local@domain> Optional (but discouraged): Subject , In-Reply-To , References . No Cc , Bcc , Content-Type , MIME-Version .
Body: plain text, max 7,500 bytes. Line length ≤ 78 characters (quoted-printable not allowed). Encoding: UTF-8, but non-ASCII characters should be escaped via \uXXXX if bandwidth critical. email 1.4 lite
Subject: "Email 1.4 Lite" – A Deep Paper on Lightweight Email Protocols and Architectures RFC 3339 second precision>
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