On 20 May 2021 at 10:29a, Wilfred van Velzen pondered and said...
 
 Wv> Why not just block his IP (range) in your firewall? That would be the
 Wv> easy sollution...

because I don't really know it, and I suspect other nodes may be part of that
range... I started to do this using specific IPs but the node concerned
changed IP each day etc. so it was a bit like playing whack a mole... hence
the thinking about using sysop name or system name

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