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Re: [apps-discuss] seeking pragmatic guidelines for content-type 'structure': when to go top-level?

Frank Ellermann <hmdmhdfmhdjmzdtjmzdtzktdkztdjz@gmail.com> Thu, 10 November 2011 11:45 UTC

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From: Frank Ellermann <hmdmhdfmhdjmzdtjmzdtzktdkztdjz@gmail.com>
Date: Thu, 10 Nov 2011 12:45:06 +0100
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To: "t.petch" <ietfc@btconnect.com>
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Cc: Apps Discuss <apps-discuss@ietf.org>
Subject: Re: [apps-discuss] seeking pragmatic guidelines for content-type 'structure': when to go top-level?
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On 10 November 2011 10:28, t.petch wrote:


> I just received an (antisocial) e-mail with .gif's
> attached, so I edited the Content-Type to be
> font/various things, and my MUA took no notice,
> just processed them as .gif.

That's okay.  RFC 2049 maps "dunno" to "application
octet-stream", and your UA or OS can figure out that
it's actually GIF looking at the first bytes...

> Only when I modified the filename (eg to .ttf) did
> the MUA take any notice and complain that the
> attachment was not a font, pdf etc.

...or looking at the extension.

> I think we need to know this for commonly deployed > platforms before we can say it is not dangerous.

+1  I vaguely recall than some fonts on my platform
use the format of a DLL.

-Frank

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