message header

基本解释

Create a message header to contain the requested service level.
创建一个消息头来包含请求服务级别。
This means that, if the request message in the request mediation flow contains an address in the message header, the request message is sent to the provider at that address.
这意味着，如果请求中介流中的请求消息在其消息头中包含一个地址，则请求消息将被发送到位于该地址的提供程序。
The logic is primarily based on filtering rules that may be applied on the message content, message header, service requester, and so on to decide the best service provider at run time.
该逻辑主要基于筛选规则，可以将这些筛选规则应用于消息内容、消息头、服务请求者等等，以在运行时决定最恰当的服务提供者。

They need the ability to encode the message header---the recipient's address---in a new and detectable way.
ENGADGET: New 'subconscious mode' could improve smartphone battery life, supress your WiFi id
As Apple is using the reply-to address of a message's User Data Header to identify the origin rather than the raw source, receiving iPhone owners risk being fooled by a phishing attack (or just a dishonest acquaintance) that poses as a contact or a company.
ENGADGET: iPhone reportedly vulnerable to text message spoofing flaw