The Dragonfly Mail Agent (dma) is a small Mail Transport Agent (MTA) which accepts mail from a local Mail User Agent (MUA) and delivers it locally or to a smarthost for delivery. dma does not accept inbound mail (i.e., it does not listen on port 25) and is not intended to provide the same functionality as a full MTA like postfix or sendmail. It is intended for use cases such as delivering cron(8) mail.
Since 2014 we have a copy of dma in the base system available as an optional component, enabled via the WITH_DMAGENT src.conf knob. I am interested in determining whether dma is a viable minimal base system MTA, and if not what gaps remain. If you have enabled DMA on your systems (or are willing to give it a try) and have any feedback or are aware of issues please follow up or submit a PR as appropriate.
