Mail-In-a-Box (MIAB)[1] comes with a built in nameserver. I think you may use it as a standalone DNS even for the domain names whose email is not managed by MIA

Mail-In-a-Box (MIAB)[1] comes with a built in nameserver. I think you may use it as a standalone DNS even for the domain names whose email is not managed by MIAB. Not sure about any benefit of doing it this way though. [1] https://mailinabox.email https://mailinabox.email