any ideas why this got marked as SPAM?

[Julian Field]

At 16:42 01/07/2002, you wrote:
>Hi
>
>Does anyone have any idea on why this email got marked as SPAM?
>
>X-MailScanner-SpamCheck: ORDB-RBL, SpamAssassin (score=-3.1, required 5,
>         IN_REP_TO, SMTPD_IN_RCVD)

Looks pretty clear to me, what's the confusion?
--
Julian Field                Teaching Systems Manager
jkf at ecs.soton.ac.uk         Dept. of Electronics & Computer Science
Tel. 023 8059 2817          University of Southampton
                             Southampton SO17 1BJ