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Specifies contents of "Content-ID" header field.
Declaration
Parameters
Description
Use this property to get/set content id of the part. Like the
Message-ID values, Content-ID values must be generated to be world-unique.
The following paragraph is taken from RFC 2045 (Freed et al.), part 7:
«The Content-ID value may be used for uniquely identifying MIME
entities in several contexts, particularly for caching data
referenced by the message/external-body mechanism. Although the
Content-ID header is generally optional, its use is MANDATORY in
implementations which generate data of the optional MIME media type
"message/external-body". That is, each message/external-body entity
must have a Content-ID field to permit caching of such data.
»
Note, this property is read-only. Use SetContentID method to set its value.
