"RandallW" <nobody at spamcop.net> wrote in message news:ggdm64$1nm$1 at news.spamcop.net... > > Just for the sake of curiosity, why are spammy's sites not resolving? > Many possible reasons, Their DNS blackholes SC's IP's Their DNS response is slow enough (possibly tweaked) that SC consistently gives up before it resolves. .....