For the records, in case someone gets stuck in the same problem. I installed a test environment x86_64 with RedHat Enterprise Linux 5.4 using their official RPMs cyrus-imapd-2.3.7-7.el5.x86_64.rpm and related. I couldn't get complie_sieve to work, it coredumped right after opening the output file for writing. Solution: compiled invoca's 2.3.14 SRPM. Since I was still setting up the system I don't know if other /usr/lib/cyrus-imapd programs fail. At the time being there is no more recent RPM on RH official repository. One more note for x86_64 and PAM authentication with LDAP backend. In /etc/pam.d/imap (smtp, pop, sieve, lmtp) files I had to use explicitly 64bit libraries: auth sufficient /lib64/security/pam_ldap.so account sufficient /lib64/security/pam_ldap.so while /lib/security/pam_ldap.so did not log any error but did not authenticate at all, not even opened the TCP connection to LDAP server. I'm not that much into 64bit yet, so others might find this info useful too. Paolo ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html