cvm-checkpassword provides a checkpassword interface for CVM modules.
cvm-checkpassword CVM Command [arguments ...]
See the above links for details on both the CVM and checkpassword interfaces. To use this interface with qmail-pop3d, use the following command line:
/var/qmail/bin/qmail-popup \ cvm-checkpassword cvm-unix \ /var/qmail/bin/qmail-pop3d ./Maildir/
Note: The default mode of operations for this module is to attempt to split a domain name from the account name. If this is not desirable, set $CVM_ACCOUNT_SPLIT_CHARS to an empty string.