* Bob Beck <[EMAIL PROTECTED]> [2007-05-22 23:45]:
> > just deduced from trial and error. Also greylisting should happen at
> > RCPT TO, and probably not at DATA as there are some widely used MTAs
> > that are buggy and choke when a 4xx error is sent in the DATA phase.
> 
>       I've been running this at DATA for months, and not seen any
> issues with it. 
> 
>       anyone here got hard evidence of such bugs - please show
> me. Or is this just uninformed speculation?

err, wait, are you giving a 4xx in reply to DATA?
that is invalid.

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