On Tue, 25 Sep 2007, Rob wrote:

> We just ran across an odd intermittent problem with email that we
> traced back to spamd showing up as an open relay. I double-checked the
> documentation and mailing list archives and didn't find anything
> relevant.

Please let us know what service (if different thatn No-IP/CheckOR.com) 
that had you listed. Was it a dnsbl service?

> Some sample results from http://www.checkor.com/:

They assume it is an open relay even though nothing was relayed. More 
accurate relay checks attempt to relay to themselves to verify.

  Jeremy C. Reed

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