The DragonFly Mail Agent is now the default MTA

[John Marino]

New installations of DragonFly will have the DragonFly Mail Agent (dma)
configured by default.  This is the first step to removing Sendmail from
base.

This particular change will only have a small impact on existing
installations.  The switch is controlled by /etc/mailer.conf, and this
file is never overwritten.  However, there was a small change in the
default configuration of periodic.conf:

daily_clean_hoststat_enable changed from "YES" to "NO"
daily_submit_queuerun changed from "YES" to "NO"

For sendmail users to remove the impact, they just need to add the
following lines to /etc/periodic.conf:

daily_clean_hoststat_enable=”YES”
daily_submit_queuerun="YES"

For new installations that want a full-featured MTA from DPorts, please
refer to a new entry in the DragonFly Handbook, "Switching Mail Transfer
Agents":
http://www.dragonflybsd.com/docs/docs/newhandbook/mta/

Before we can remove sendmail from base, the installworld script has be
upgraded to detect when the ${DESTDIR}/etc/mailer.conf file is still
configured to the base sendmail.  If it does detect that case, the
installation will not commence.  This is to break a routine master
branch upgrade from inadvertently breaking mail services.  The
administrator will have to configure another MTA to complete the
installation.

John