> Hmm. How do I check that?
> Running nslookup defaults to my local resolver instance.

If it happens silently at the ISP's end, you can't check it - except
indirectly. What are the return codes that you get from your Spamhaus
Zen queries?

-- 
Atro Tossavainen, Chairman of the Board
Infinite Mho Oy, Helsinki, Finland
tel. +358-44-5000 600, http://www.infinitemho.fi/
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