TCP IP Illustrated

The subtype is alternative and two different

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Unformatted text preview: ntially, and the boundary between the parts is the string NextPart, preceded by two hyphens at the start of a line. Each boundary can be followed with a line specifying the header fields for the next part. Everything in the message before the first boundary is ignored, as is everything following the final boundary. Since a blank line follows the first boundary, and not header fields, the content type of the data between the first and second boundaries is assumed to be text/plain with a character set of us-ascii. This is a textual description of the new RFC. The second boundary, however, is followed by header fields. It specifies another multipart message, with a boundary of OtherAccess. The subtype is alternative, and two different alternatives are present. The first OtherAccess alternative is to fetch the RFC using electronic mail, and the second is to fetch it using anonymous FTP. A MIME user agent would list the two alternatives, allow us to choose one, and then automatically fetch a copy of the RFC using either mail or anonymous FTP. To: [email protected] Subject: RFC1479 on IDPR Protocol Mime-Version: 1.0 Content-Type: Multipart/Mixed; Boundary="NextPart" Date: Fri, 23 Jul 93 12:17:43 PDT From: "Joyce K. Reynolds" <[email protected]> the first boundary --NextPart A new Request for Comments is now available in online RFC libraries. (details here on the new RFC) ... Below is the data which will enable a MIME compliant Mail Reader implementation to automatically retrieve the ASCII version of the RFCs. the second boundary --NextPart Content-Type: Multipart/Alternative; Boundary="OtherAccess" a nested multipart message with a new boundary --OtherAccess Content-Type: Message/External-body; access-type="mail-server"; server="[email protected]" file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/smtp_sim.htm (21 of 23) [12/09/2001 14.47.52] Chapter 28. SMTP: Simple Mail Transfer Protocol Content-Type; text...
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