From: "Geo." 

Just from what I've seen, most mail servers and email clients don't notice
anything beyond the first digit in the error number 4xx or 5xx are the only
difference, whatever number you put after that first digit doesn't seem to
make any difference in how it's treated. The spammer servers seem to treat
everything like a 4xx error, retry retry retry..

Geo.

"Paul Ranson"  wrote in message
news:3f9ae90e$1{at}w3.nls.net...
> It's quite permissable to produce a 5xx error after the completion of the
> data. In the case of an attempt to send spam or a virus I think it would
be
> a 550 for policy reasons.
>
> (Knowing way too much about this stuff. Expect something soon.)
>
> Paul
>

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