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X.400 Attachments & MIME

In article <1995May23.223143.10052@eisner>,
Jean-Francois Mezei <mezei_jf@eisner.decus.org> wrote:
>MIME is a hack to counter the SMTP's limit to 7 bit characters.

Among other things, yes.

[ Note, though, that ESMTP and the 8BIT and BINARY extensions lift
this limitation. ]

>                                                                It is quite
>inefficient in tersm of bandisth usage since it hexifies a lot of the data and
>hence can take up to twice the size of a binary attachement.

Where do you get your figure of "up to twice the size"?  The base64
encoding expands data by a ratio of 3:4.

I suppose foolish use of the quoted-printable encoding could expand
your data by up to 3 times, but it would be an extremely poor MIME
implementation that did that.

Tim.
--
Tim Goodwin        | "If you're used to paint-by-number, a blank canvas
Public IP Exchange | can be unsettling at first." -- Larry Wall

Original headers:

From: tim@pipex.net (Tim Goodwin)
Newsgroups: comp.protocols.iso.x400
Subject: Re: X.400 Attachments & MIME
Date: 19 Jun 1995 18:15:06 +0100
Organization: PIPEX, 216 Science Park, Cambridge, England
Message-ID: <3s4baq$fvh@pipe.pipex.net>
References: <3orlc8$rgo@news.dgsys.com> <1995May23.223143.10052@eisner>

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