Re: [ietf-smtp] Stray <LF> in the middle of messages

Valdis Kl ē tnieks <> Wed, 10 June 2020 10:34 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 6BFBD3A08E4 for <>; Wed, 10 Jun 2020 03:34:23 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=unavailable autolearn_force=no
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id B2HLqCQSPhkg for <>; Wed, 10 Jun 2020 03:34:21 -0700 (PDT)
Received: from ( [IPv6:2607:b400:92:8300:0:c6:2117:b0e]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 611C43A08E5 for <>; Wed, 10 Jun 2020 03:34:21 -0700 (PDT)
Received: from ( [IPv6:2607:b400:92:8400:0:72:232:758b]) by (8.14.4/8.14.4) with ESMTP id 05AAYJdl018900 for <>; Wed, 10 Jun 2020 06:34:19 -0400
Received: from ( []) by (8.14.7/8.14.7) with ESMTP id 05AAYERC011625 for <>; Wed, 10 Jun 2020 06:34:19 -0400
Received: by with SMTP id p18so1362650qvy.11 for <>; Wed, 10 Jun 2020 03:34:19 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:in-reply-to:references :mime-version:content-transfer-encoding:date:message-id; bh=kfSFG+4g8jHqr2pE1lVeKnrDkMIuMVq0Rk9PLtCjeHs=; b=WwBCnlar1K6zcx5RZE3b3qzgW7h1QTXuDI9SK4Ebl3ZXpqumYQBM7CslLIxt5pgskA mHbkgF1oGeMnTOj04xt/Rkoy3KwTi+SiA+W8GGbUtWc4DmFFCMO9A/ZTUlp/42ZWBSKa MmKhWUZd7sAgdy/S95HKcqs0NklXM8l2neCz291pd7WQOrqLEsdg9b/ME7QHRh2ItsY3 zvqlhRSLq0T86TbeSG7WtRXRZdMsP+JS/4iWSNfLfn342Dxm5ENBBRERIuoVxoOMO2Xt D8fcYyOKK3HBIMhI8rj618h39TU3L59E5E0KotCXMPB+WM6aIxYF7OaFhUa8gzeCnXS0 15sg==
X-Gm-Message-State: AOAM5304tUQmQn1Bx/F/WmOalwjMxhDXL1Pe1jNy2ZNgPBhWnDlrdBkA ri9Xw1Pg17RmEg7XvDragfq1eal0L6GdhsMd71urSwdx4zKaH89dz5kJsOGKS13JLJ+syc4RiOB 22MULXZpwSMtqbvJ0lbRTgQ==
X-Received: by 2002:ad4:42b1:: with SMTP id e17mr2517774qvr.104.1591785253721; Wed, 10 Jun 2020 03:34:13 -0700 (PDT)
X-Google-Smtp-Source: ABdhPJwv6R/QyBiUmc/Xn9qUvMSFgPwT5zz61gKeKR8SiBU0HPuRKXQX1S8f4eix9hX4eixXmqnT2g==
X-Received: by 2002:ad4:42b1:: with SMTP id e17mr2517752qvr.104.1591785253212; Wed, 10 Jun 2020 03:34:13 -0700 (PDT)
Received: from turing-police ([2601:5c0:c001:c9e1::359]) by with ESMTPSA id z4sm12897710qtu.33.2020. (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Jun 2020 03:34:11 -0700 (PDT)
Sender: Valdis Kletnieks <>
From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" <>
X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" <>
X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev
Cc: Leo Gaspard <>,
In-Reply-To: <>
References: <> <>
Mime-Version: 1.0
Content-Type: multipart/signed; boundary="==_Exmh_1591785250_27407P"; micalg=pgp-sha1; protocol="application/pgp-signature"
Content-Transfer-Encoding: 7bit
Date: Wed, 10 Jun 2020 06:34:10 -0400
Message-ID: <30165.1591785250@turing-police>
Archived-At: <>
Subject: Re: [ietf-smtp] Stray <LF> in the middle of messages
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Discussion of issues related to Simple Mail Transfer Protocol \(SMTP\) \[RFC 821, RFC 2821, RFC 5321\]" <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Wed, 10 Jun 2020 10:34:24 -0000

On Mon, 08 Jun 2020 10:03:49 -0400, Hector Santos said:

> The Internet Mail format officially starting with RFC 822 selected the 
> DOS/Windows format <CR><LF> format.
> Why?
> Maybe because at that point in time, Microsoft had owned 90% of the 
> growing Personal Computer (PC) market.  The Mac was still considered 
> (legally) a luxury commodity (otherwise their anti-trust status would 
> no longer apply), and *nix was still mostly at the IT networking level.

Unlikely.  When RFC822 came out in 1982, the IBM PC was a whole whopping 12
months old, even TCP/IP was equally young, the concept of a consumer ISP was
still a decade away, and most of the Arpanet/Milnet and CSNet were various
Unixoid systems, except for some oddball IBM mainframes and all the 36-bit
boxes running TOPS-10 and -20 and Multics, and you couldn't easily hook a
Windows box to an Ethernet because the Clarkson Packet drivers were like 5
years away, KA9Q was still 3 years away, and even MIT's PC/IP was out for only
6 months.

Oh, and the Macintosh wasn't a "luxury item" - it was non-existent, as the first
Macintosh was famously announced in a killer ad during the 1984 Super Bowl.

(When Clarkson got on the Arpanet in summer 1984, the 30 or so Sun and Unix
boxes added an entire 1% to the size of the Internet, which was only around
3,000 directly connected machines at the time. And I had to hear in details
what Russ Nelson thought of Microsoft's OS because he was writing the packet
drivers in the cubicle next to mine. :)