I'm running zcs-5.0.13 on centos 4. I've noticed since a couple of upgrades ago that I've been getting a lot of spam. After digging into the cause of the problem, I see that I'm not getting any X-DSPAM or X-Spam headers in my incoming messages like I used to, only seeing X-Virus-Scanned headers from amavisd. The anti-spam service is running, but it seems like I'm missing the spamassassin binaries. Any suggestions on what I could check for that may be causing the problem?