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- Newsgroups: comp.mail.headers
- Path: sparky!uunet!gatech!concert!uvaarpa!murdoch!aemsun.med.Virginia.EDU!sdm7g
- From: sdm7g@aemsun.med.Virginia.EDU (Steven D. Majewski)
- Subject: Re: Canonical list of mail headers?
- Message-ID: <1992Sep2.165221.10557@murdoch.acc.Virginia.EDU>
- Followup-To: comp.mail.headers
- Summary: Addition to list: those mentioned in rfc1327
- Keywords: rfc822, X.400
- Sender: usenet@murdoch.acc.Virginia.EDU
- Organization: University of Virginia
- References: <1992Sep1.180842.4553@tfs.com> <1992Sep1.235652.17536@murdoch.acc.Virginia.EDU>
- Date: Wed, 2 Sep 1992 16:52:21 GMT
- Lines: 165
-
- [ Here is another list extracted from RFC-1327 - sdm ]
-
- RFC 1327 Mapping between X.400(1988) and RFC 822 May 1992
-
- 2.2. RFC 822
-
- RFC 822 does not explicitly define service elements, as distinct from
- protocol elements. However, all of the RFC 822 header fields, with
- the exception of trace, can be regarded as corresponding to implicit
- RFC 822 service elements.
-
- 2.2.1. Origination in RFC 822
-
- A mechanism of mapping, used in several cases, is to map the RFC 822
- header into a heading extension in the IPM (InterPersonal Message).
- This can be regarded as partial support, as it makes the information
- available to any X.400 implementations which are interested in these
- services. Communities which require significant RFC 822 interworking
- are recommended to require that their X.400 User Agents are able to
- display these heading extensions. Support for the various service
- elements (headers) is now listed.
-
- Date:
- Supported.
-
- From:
- Supported. For messages where there is also a sender field,
- the mapping is to "Authorising Users Indication", which has
- subtly different semantics to the general RFC 822 usage of
- From:.
-
- Sender:
- Supported.
-
- Reply-To:
- Supported.
-
- To: Supported.
-
- Cc: Supported.
-
- Bcc: Supported.
-
- Message-Id:
- Supported.
-
- In-Reply-To:
- Supported, for a single reference. Where multiple
- references are given, partial support is given by mapping to
- "Cross Referencing Indication". This gives similar
- semantics.
-
- References:
- Supported.
-
- Keywords:
- Supported by use of a heading extension.
-
- Subject:
- Supported.
-
- Comments:
- Supported by use of an extra body part.
-
-
- Encrypted:
- Supported by use of a heading extension.
-
- Resent-*
- Supported by use of a heading extension. Note that
- addresses in these fields are mapped onto text, and so are
- not accessible to the X.400 user as addresses. In
- principle, fuller support would be possible by mapping onto
- a forwarded IP Message, but this is not suggested.
-
- Other Fields
- In particular X-* fields, and "illegal" fields in common
- usage (e.g., "Fruit-of-the-day:") are supported by use of
- heading extensions.
-
- 2.2.2. Reception by RFC 822
-
- This considers reception by an RFC 822 User Agent of a message
- originated in an X.400 system and transferred across a gateway. The
- following standard services (headers) may be present in such a
- message:
-
- Date:
-
- From:
-
- Sender:
-
- Reply-To:
-
- To:
-
- Cc:
-
- Bcc:
-
- Message-Id:
-
- In-Reply-To:
-
- References:
-
- Subject:
-
- The following non-standard services (headers) may be present. These
- are defined in more detail in Chapter 5 (5.3.4, 5.3.6, 5.3.7):
-
- Autoforwarded:
-
- Content-Identifier:
-
- Conversion:
-
- Conversion-With-Loss:
-
- Delivery-Date:
-
- Discarded-X400-IPMS-Extensions:
-
- Discarded-X400-MTS-Extensions:
-
- DL-Expansion-History:
-
- Deferred-Delivery:
-
- Expiry-Date:
-
- Importance:
-
- Incomplete-Copy:
-
- Language:
-
- Latest-Delivery-Time:
-
- Message-Type:
-
- Obsoletes:
-
- Original-Encoded-Information-Types:
-
- Originator-Return-Address:
-
- Priority:
-
- Reply-By:
-
- Requested-Delivery-Method:
-
- Sensitivity:
-
- X400-Content-Type:
-
- X400-MTS-Identifier:
-
- X400-Originator:
-
- X400-Received:
-
- X400-Recipients:
-