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Old 27th October 2008
J65nko J65nko is offline
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Join Date: May 2008
Location: Budel - the Netherlands
Posts: 4,130
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You can check whether you server is doing RBL lookups (a kind of DNS lookups) by running tcpdump
Code:
tcpdump -ni bge0 'port 53'
I am afraid I cannot offer much assistance with the main Postfix issue.

According to http://wiki.centos.org/HowTos/postgrey the greylisting is rather easy to spot in the maillogs.
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump
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