As of today, *@*.ru *@*yahoo* and *@*hotmail* emails can now register at DMZX again. If this causes an influx in spam, we'll deal with it, but not using such heavyhanded measures.
Any similarly heavyhanded email filters will also be removed as we find them.
Thanks for your patience, all.

And thank you to the persistent user who found our IRC channel (irc.slashnet.org #mzx btw) and reported the issue.