[Dovecot] sieve in centos rpm

[Chantal Rosmuller]

Hi Everyone, 

i installed dovecot-1.0-1.2.rc15.el5 with yum on centos 5.0, everything works 
fine but I can't find the sieve plugin. Is it not included? 
When I search for sieve with yum I find cyrus-imapd.

Thanks