I'm currently using 2 (for redundancy) QmailToaster boxes to filter in
front of an Exchange server. They are not currently configured with taps.
Management has expressed some concern because we are unable to retrieve
messages that have been blocked.
I have some questions about taps. Taps won't see messages that are
blocked by chkuser or spamdyke, right?
I am considering implementing a two-stage approach. The first box in
line will do no filtering, it will simply copy each incoming message via
a tap on the domain and forward to the next stage. Tapped messages will
be deleted via a cron job after 7 days. The second stage will filter
with chkuser, spamdyke, spamassassin, clamav, etc., more aggressively
than what we currently implement before sending mail on to Exchange.
Is this a good approach? Are there any gotchas I should be looking out for?
Brent Gardner
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