The remote host is missing an update to imap announced via advisory MDVSA-2009:064.
To upgrade automatically use MandrakeUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. https://secure1.securityspace.com/smysecure/catid.html?in=MDVSA-2009:064
Security vulnerabilities has been identified and fixed in University of Washington IMAP Toolkit which could allow local users to gain privileges by specifying incorrect folder name (CVE-2008-5005). The updated packages have been patched to prevent this. Affected: Corporate 3.0