Test for MIME

Tyler Nally (tnally@iquest.net)
Thu, 24 Sep 1998 10:48:14 -0500


At 10:04 AM 9/24/98 -0500, Bro Shaw wrote:
>I'm just making sure that I have properly reconfigured my Outlook.

Poifectomundo!  

Previously, Bro Shaw posted (using MS Outlook Express) with MIME attachment's
and encodings..... when you use a plain e-mail reader, it looked like you're
reading a web page with all of it's hypertext markup.

The real tell tale sign of MIME attachments being used is the "Content-Type:"
e-mail header line.... if it's anything other than...

    Content-Type:  text/plain     (text/plain is sometimes followed by
                                   encoding charset [like iso-8859-1] 
                                   which is perfectly acceptable)

making an entry like this...

    Content-Type: text/plain;
	    charset="iso-8859-1"

The bad boy MIME types are just about anything *other* than a text/plain.
They are MIME/Content-Type's that declare a *boundary* in e-mail something
like this.....

      Content-Type: multipart/alternative;
	      boundary="----=_NextPart_000_0031_01BDE798.914E1260"

... meaning that anytime the e-mail message came across a boundary line
defined as ...

      ----=_NextPart_000_0031_01BDE798.914E1260

... at the beginning of a line, it's a signal to the e-mail client that a 
old part of the message has ended (old segment) and the new part of the
e-mail message has started (new segment).

Boundaries aren't always the same from e-mail message to e-mail message.
But they will be the same inside of the same message.

Anytime I see a "multipart/alternative" in the e-mail headers... that's
immediate reason for me to *zot* the message from distribution.  If the
poster hadn't done that before with the list that I can remember, I'll 
typically tell them so about what the Netiquette document says about MIME
types and then point them to the Higher-Fire archive site where there's
several e-mail posts (accessable by the "Posting Guidelines" page) that
tell how to De-MIMEify Netscape Navigator, MS Outlook, and MS Outlook Express.
The Higher-Fire archives are *now* always accessible at...

      http://www.elilabs.com/higher-fire

Bro Tyler
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