''Content-Length:'' '''

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. It is always created or added by MUAs or delivery agents and never by MTAs. It should never be declared in the configuration file.

Chapter 1. Some Basics

Part I: Build and Install

Part II: Administration

Part III: The Configuration File

Chapter 17. Configuration File Overview

Chapter 19. The S (Rule Sets) Configuration Command

Chapter 20. The M (Mail Delivery Agent) Configuration Command

Chapter 21. The D (Define a Macro) Configuration Command

Chapter 24. The O (Options) Configuration Command

Chapter 25. The H (Headers) Configuration Command

25.2 Header Names

25.3 Header Field Contents

25.4 ?flags? in Header Definitions

25.5 Rules Check Header Contents

25.6 Header Behavior in conf.c

25.7 Headers and mc Configuration

25.8 Headers by Category

25.9 Forwarding with Resent Headers

25.10 Precedence

25.12 Alphabetized Header Reference

''Apparently-From:'' '''

''Apparently-To:'' '''

''Auto-Submitted:'' '''

''Comments:'' '''

''Content-Description:'' '''

'Content-Disposition:'' ''''

'Content-Id:'' ''''

''Content-Length:'' '''

''Content-Transfer-Encoding:'' '''

''Content-Type:'' '''

''Delivered-To:'' '''

''Disposition-Notification-To:'' '''

''Encrypted:'' '''

''Errors-To:'' '''

''Full-Name:'' '''

''In-Reply-To:'' '''

''Keywords:'' '''

''Mail-From:'' '''

''Message-ID:'' '''

''Message:'' '''

''MIME-Version:'' '''

''Posted-Date:'' '''

''Precedence:'' '''

''Priority:'' '''

''Received:'' '''

''References:'' '''

''Reply-To:'' '''

''Return-Path:'' '''

''Return-Receipt-To:'' '''

''Sender:'' '''

''Subject:'' '''

''X-Authentication-Warning:'' '''

''X400-Received:'' '''