Smart Network Data Service[1] which, like Google's postmaster[2], is not terribly useful for small servers as it requires a certain volume of messages before it

Smart Network Data Service[1] which, like Google's postmaster[2], is not terribly useful for small servers as it requires a certain volume of messages before it shows any info. A volume you won't reach from a personal server. [1] https://postmaster.live.com/snds/ https://postmaster.live.com/snds/ [2] https://postmaster.google.com/ https://postmaster.google.com/