The srpm for cyrus-imapd should rebuild correctly under mandrake starting
from 8.2 (I only tested it with 8.2 and 10.0).
Since it needs cyrus-sasl >= 2.1.15, you'll also find an SRPM for it that
you'll need for 8.2/9.0/9.1 (9.2 already comes with 2.1.15).
BEWARE: this version of sasl is designed to coexist with v1
packages, and since 9.2 got rid of v1 altogether, you may experience
problems when you upgrade your distribution to 9.2 or later.