I have tried sending this to the proper channels and have been ignored. mail.asiaonline.net.nz's spam filter instead of rejecting emails it doesn't like defers them which mean they sit in our mail queue for a week retrying every 4 hours and clogging our and their mailservers. This seems to me like a rather nonsensical thing to do.
Sep 3 15:26:33 tiny sendmail[26020]: h7V3CIlM028321: to=<ADDRESSREMOVED>, delay=3+00:13:59, xdelay=00:00:06, mailer=esmtp, pri=25950368, relay=mail.asiaonline.net.nz., dsn=4.0.0, stat=Deferred: 450
... 163.net,Known spam domain
PS: This went thru our mailserver because we are forwarding that email
address and obviously have different spam filter's than asiaonline.
jfp.
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Jean-Francois Pirus