Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Get The TCP/IP Guide for your own computer.
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Key Applications and Application Protocols
           9  TCP/IP File and Message Transfer Applications and Protocols (FTP, TFTP, Electronic Mail, USENET, HTTP/WWW, Gopher)
                9  TCP/IP Electronic Mail System: Concepts and Protocols (RFC 822, MIME, SMTP, POP3, IMAP)
                     9  TCP/IP Electronic Mail Message Formats and Message Processing: RFC 822 and MIME
                          9  TCP/IP Enhanced Electronic Mail Message Format: Multipurpose Internet Mail Extensions (MIME)

Previous Topic/Section
MIME Content-Type Header and Discrete Media: Types, Subtypes and Parameters
Previous Page
Pages in Current Topic/Section
123
4
56
Next Page
MIME Content-Transfer-Encoding Header and Encoding Methods
Next Topic/Section

MIME Composite Media Types: Multipart and Encapsulated Message Structures
(Page 4 of 6)

Multipart Message Structure

These rules seem rather complicated, but they really aren’t that bad; once you’ve seen a couple of multipart messages the structure will make sense. To help clarify, I have provided Figure 302, which shows graphically the overall structure of a multipart MIME message.


Figure 302: MIME Multipart Message Structure

A MIME multipart message consists of a set of main headers and a main body portion, like all messages. Within the main body are one or more body parts, each of which has its own body-part-specific headers followed by the body part itself; each body part is shown in blue. The Content-Type header of the message as a whole (highlighted in green) indicates that the message type is multipart, and the boundary parameter specifies the name of the delimiter, in this case just called “Delimiter” (how boring.) This delimiter is used to separate the body parts from each other and from the preamble and epilogue that begin and end the message body, respectively.

 


Previous Topic/Section
MIME Content-Type Header and Discrete Media: Types, Subtypes and Parameters
Previous Page
Pages in Current Topic/Section
123
4
56
Next Page
MIME Content-Transfer-Encoding Header and Encoding Methods
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.