x-mq-ip verifiedcritical

The header form of the most consequential choice in the product. An exporter that adds x-mq-ip: 178.253.53.83 has selected a sending address without pools, without configuration, and without any knowledge of the node's arrangement. Compare with the alternative that needs no header at all: submitting to the address itself, which the intake mapping turns into the sending address. Both work; the header wins when the exporter talks to one endpoint and decides per message, the mapping wins when the exporter can be pointed at different endpoints. Its power is also the reason the intake must be closed: anyone who can submit can name any of the node's addresses.