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- From: sdm7g@aemsun.med.Virginia.EDU (Steven D. Majewski)
- Newsgroups: comp.mail.headers
- Subject: Re: Canonical list of mail headers?
- Message-ID: <1992Sep2.153618.9280@murdoch.acc.Virginia.EDU>
- Date: 2 Sep 92 15:36:18 GMT
- References: <1992Sep1.180842.4553@tfs.com> <1992Sep1.235652.17536@murdoch.acc.Virginia.EDU> <BtxG3C.5v8@solbourne.com>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- Lines: 44
-
- In article <BtxG3C.5v8@solbourne.com> imp@solbourne.com (Warner Losh) writes:
-
- >In article <1992Sep1.235652.17536@murdoch.acc.Virginia.EDU>
- >sdm7g@aemsun.med.Virginia.EDU (Steven D. Majewski) writes:
- >
- >>What are the common ( and FUNCTIONAL, i.e. not just decorative )
- >>X-extensions: ?
- >
- >There are none, by definition. Err, that defintion has been changed.
- >The only ones that should be functional are the ones that are found in
- >the PEM RFC's (1113-1115). I know of no other common, functional
- >ones. They usually just add information useful later on....
- >
-
- I don't know if "functional" is the right word.
- I DIDN'T want to use "standard", as by definition, "X" means not defined
- in the standard. ( except for rfc's 1113-1115 - thanks for pointing that
- out, I missed those. )
-
- But what I wanted is to exclude things like "X-Last-Band-Seen:" , etc.
- and to include things like "X-mailer:" or the headers added by gateway
- of other mail-software, like the "X-VMS-To:" that PMDF adds to leave a
- trace of what the original user entered address was.
-
- [ I'm not sure how I feel about things like X-longitude:,X-latitude:,
- X-phone-number: , etc. They may be "canonical" even if not currently
- "functional" in my sense. If they *are* canonical (i.e. semi-standard),
- though, they can perhaps be *made* to be functional. ]
-
- I could try to say the distinguishing feature is that the X-headers I'm
- interested in are those added (and possibly read) by Programs rather than
- People, except that they are ALL added by programs. So I have to exclude
- those inserted by inclusion in a .[elm]headers file or via an 'edit headers'
- command.
-
- The other related question is, what (if any) X-headers are read and used
- by other programs ( and therefore, are 'functional' ). The standard doesn't
- say they cannot be used. Only that they are non-standard and can't be relied
- upon to do anything or a particular thing. But are there any gateways that
- recognize a conforming non-standard X-header as 'hints' or some other
- (machine) 'functional' information ?
-
-
- - Steve Majewski
-