Can anyone tell me if SpamAssassin is running on my new installation?

What: I installed 7.26GA because I needed to put it on an i386 machine, long story.

I run: "ps -ef |grep spam" ...but nothing comes up. And...if I "apt-get install assassin" asks me if I want to install it.

What I'm wondering this: I'm getting a ton of spam with this new server install even though I have followed most of Zimbra's recommendations on spam.