The uw-imap ebuild generates /etc/pam.d files that do not use pam_stack.so From /var/tmp/portage/uw-imap-2001a-r1/image : xabbu image # cat etc/pam.d/imap #%PAM-1.0 auth required pam_pwdb.so shadow nullok account required pam_pwdb.so session required pam_pwdb.so From /var/tmp/portage/courier-imap-1.4.5/image : #%PAM-1.0 # # $Id: system-auth.authpam,v 1.1 2001/02/02 05:42:57 mrsam Exp $ # # Copyright 1998-2001 Double Precision, Inc. See COPYING for # distribution information. # # This is a sample authpam configuration file that uses pam_stack # (circa linux-pam 0.72). auth required pam_nologin.so auth required pam_stack.so service=system-auth account required pam_stack.so service=system-auth session required pam_stack.so service=system-auth Solution: Replace /usr/portage/uw-imap/files/imap.pam with: auth required pam_nologin.so auth required pam_stack.so service=system-auth account required pam_stack.so service=system-auth session required pam_stack.so service=system-auth
