Getting Past SpamAssassin

[Peter Ong]

Dear MailScanner Gods,

MailScanner: 4.79.11
spamassassin-3.2.5-1.el5


Please hear my prayers. Here's the weirdest thing...

Under what circumstance could an email come through without passing through SpamAssassin? My configuration is as close to vanilla as possible. There have been no esoteric changes.

A piece of spam came through this morning. It does not appear to have been scanned by SpamAssassin. Just to test, I scanned it as root. It scored a whopping 25.5 points. Then, I thought, maybe MailScanner runs spamassassin as postfix. So I scanned the same email as postfix, and spamassassin gave it a 32 points. Either way this should've been obliterated, but it shows:

X-Spam-Status: No
X-DTi-MailScanner-From: myemail at myserver.com
X-DTi-MailScanner: Found to be clean
X-DTi-MailScanner-ID: 7BB9B1908B1.AB3F2
X-DTi-MailScanner-Information: Please contact the ISP for more information
X-Greylist: delayed 303 seconds by postgrey-1.32 at mygateway.tld; Mon, 04 Oct 2010 06:22:01 UTC
Received: from 240.34.177.94.netvisiontelecom.ro (unknown [94.177.34.240])
	by myserver.com (Postfix) with ESMTP id 7BB9B1908B1
	for <myemail at myserver.com>; Mon,  4 Oct 2010 06:22:01 +0000 (UTC)

At first, I thought this was the reason:
Max SpamAssassin Size = 200k

But the message was only 4K. Therefore, it is something else.

Running spamassassin as postfix, I got these:
[26774] warn: config: cannot write to /var/spool/postfix/.spamassassin/user_prefs: No such file or directory
[26774] warn: config: failed to create default user preference file /var/spool/postfix/.spamassassin/user_prefs

Could these have something to do with my problem? Under what circumstance could an email come through without passing through SpamAssassin?

Thanks.

p