The legal parameters
are shown in Table 25-13.
In general, the Content-Disposition: header should be advisory.
25.12.9 Content-Id:
A MIME part content identifier RFC2392
The MIME Content-Id: header obeys the same rules for its value as does the Message-Id:
header (?§25.12.24 on page 1159). The difference is that the Message-Id: header identifies
Table 25-13. Content-Disposition: parameters
Parameter Description of value
filename The name of the file into which to save the contents. This can be a full path specification. In general,
automatically honoring this equate represents a risk.
creation-date The original time and date the content was created.
modification-date The time and date the content was last modified.
read-date The time and date the content was last read.
size The size in bytes of the content.
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1154 | Chapter 25: The H (Headers) Configuration Command
the entire email message, whereas the Content-Id: header identifies only a given part of a
MIME message.
25.12.10 Content-Length:
The size of the body of the message System V Release 4
The Content-Length: header describes the exact size of the body of a message. The size is
always a decimal expression of the number of bytes occupied by the body:
Content-Length: 5678
It is used by some MUAs to find the end of the message in a large file of many messages.
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