fighting spam with sendmail

[pcthuglife]

The company I work for recently switched from Qmail to Sendmail. We were using spam assassin on our Qmail server to help cut down on all the crap we received but I was wondering if sendmail offered a better alternative to spam assassin. Basically I know that sendmail is one of the most widely used MTA's out there so I figured there might be some anti-spam software written specifically for it. If not I'll probably just install spam assassin again and wait another 2 years for it to do its learning.