I just got through updating my /etc/mail/access file, adding about 20 more IP's that are sending spam/junk mail. During the process, I noticed I had some partial IP's in there, like 64.12.233 which is what I wanted to block. The IP did NOT however get blocked. From what I see, as long as I have a full ip address, they are blocked, but the partial (16) is not. Should it not work anyhow? Never had this problem before, and yes, I run a make on the file after editing.
Sam