qmail-qmqpc - queue a mail message via QMQP
qmail-qmqpc
qmail-qmqpc offers the same interface as qmail-queue, but it gives the message to a QMQP server instead of storing it locally.
In a mini-qmail installation, qmail-queue is replaced with a symbolic link to qmail-qmqpc.
qmqpservers
IP addresses of QMQP servers, one address per line and eventually include the name of the interface to bind to for IPv6 LLUs:
192.168.1.1
2001:fefe::31
fe80::fefe:1%eth0
qmail-qmqpc will try each address in turn until it establishes a QMQP connection or runs out of addresses.
qmail-control(5), qmail-queue(8), qmail-qmqpd(8)