outgoingMessage.setHeader(name, value)


设置单个标头值。 如果待发送标头中已经存在该标头,则替换其值。 使用字符串数组发送多个同名标头。

Sets a single header value. If the header already exists in the to-be-sent headers, its value will be replaced. Use an array of strings to send multiple headers with the same name.