This is wormhole, a project to bring back Dovecot's replication feature for Dovecot 2.4 and later. It is mainly a fork of the Dovecot 2.3 replication code ported to Dovecot 2.4. The forked code was removed by the Dovecot maintainers from Dovecot starting with Version 2.4. This project aims to provide the feature as a plugin for Dovecot 2.4 and higher.