'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 (Message-ID:). The difference is that the Message-Id: header identifies the entire email message, whereas the Content-Id: header identifies only a given part of a MIME message.

    Part I: Build and Install
    Part II: Administration
    Part III: The Configuration File
    Chapter 21. The D (Define a Macro) Configuration Command
    Chapter 24. The O (Options) Configuration Command