There are several ways to get in contact with the developers of NNTPGrab.
On this website, there is a forum where you can get in contact with the developer of NNTPGrab
A lot of discussions about the development of the project happen at the IRC channel #nntpgrab which is on irc.nntpgrab.nl
The main developer of NNTPGrab, Erik van Pienbroek, can be reached at the e-mail address info at nntpgrab dot nl
If you have any questions about NNTPGrab, please use the Discussion Forum as e-mail might easily get lost or overlooked at.
There aren't any mailing lists for NNTPGrab yet, but if there's a demand, it can be set up.