[courier-users] Question about SMTP RBL code

I have Courier configured to query the SBL-XBL list in order to block
off some of the more flaggarant spammers. What I see in my logs is a
lot of this:

Apr 3 04:07:35 courier courieresmtpd: started,ip=[198.172.95.91]
Apr 3 04:07:43 courier courieresmtpd:
error,relay=198.172.95.91,from=<FactoryDirectRewar ds@bocelclk.com>,to=<s_mtalladay@pbu.edu>:
511 http://www.spamhaus.org/SBL/sbl.lasso?query=SBL25510
Apr 3 04:07:43 courier courieresmtpd:
error,relay=198.172.95.91,msg="502 ESMTP command error",cmd: DATA

Why does courieresmtpd wait until after mail from: and rcpt to: to do
the rbl lookup? Couldn't it do it after the helo or even as soon as the
smtp client starts the connection? According to my logs, courieresmtpd
still isn't hanging up after the 511, spambots still try to send DATA.
Is there a reason Courier doesn't forcefully drop the tcp connection
after the 511?

Jay

--
Jay Lee
Network / Systems Administrator
Information Technology Dept.
Philadelphia Biblical University
--



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