https://www.openldap.org/lists/openldap-software/200412/msg00308.html
Re: qpopper and ldap?
qpopperldap
https://dovecot.org/list/dovecot/2007-July/024293.html
[Dovecot] qpopper - dovecot migration : which pop3_uidl_format?
dovecotqpoppermigrationpop3uidl