[Dovecot] dovecot + antispam + sendmail

Whats a good antispam solution? I am using sendmail and dovecot 1.1. I came across dovecot's antispam plugin, but it seems it does not support 1.1 yet. I am also looking for something non-perl based.

I am already doing some greylisting with sendmail milter.

Any other good suggestions? If not, I guess I might have to downgrade back to 1.0 dovecot.

Thanks