How to flush the queue in DragonFly Mail Agent (DMA)

DMA keeps on trying to send this EMail:

$ dma -bp
ID  : c08be.177cb00
From: example@foo.bar
To  : example@foo.bar

How can I flush the queue?

Solution

This might be helpful for someone:

Retrieve the PID and kill the process

$ ps -ef | grep dma
mail      6922     1 66 Jun28 ?        15:31:04 /usr/sbin/dma -q1
$ kill -9 6922