X-FOOBAR: style headers (What are they?)

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Article #8

From: Paul Lutt
Date: Tue, 21 Jul 1992 16:06

17 lines
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While not a newcomer to email or netnews, I'm a bit confused about the
origin and use of email headers of the form:

    X-FOOBAR:

Where FOOBAR may be some commonly used header field, such as
FROM.

I've looked through the RFCs that we have locally and can find no
mention of this practice.  Could some kind soul please enlighten me?
Thanks.
--
	Paul Lutt
Domain:	pwl@tc.fluke.COM
 Voice:	+1 206 356 5059
  UUCP:	uunet!fluke!pwl
 Snail:	John Fluke Mfg. Co. / P.O. Box 9090 / Everett, WA 98206-9090

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Message-ID: <1992Jul21.160603.4774@tc.fluke.COM>

Path:

arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!sdd.hp.com!usc!news.bbn.com!micro-heart-of-gold.mit.edu!uw-beaver!fluke!pwl

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Newsgroups: comp.mail.headers
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!sdd.hp.com!usc!news.bbn.com!micro-heart-of-gold.mit.edu!uw-beaver!fluke!pwl
From: pwl@tc.fluke.COM (Paul Lutt)
Subject: X-FOOBAR: style headers (What are they?)
Message-ID: <1992Jul21.160603.4774@tc.fluke.COM>
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Date: Tue, 21 Jul 1992 16:06:03 GMT
Lines: 17