On Wed, 11 Jul 2018, mj wrote:
If you consider ceph as "the cloud", this could also apply: https://github.com/ceph-dovecot/dovecot-ceph-plugin
Maybe the OP will find the following article interesting
http://www.admin-magazine.com/Archive/2015/26/Scalable-mail-storage-with-Dovecot-and-Amazon-S3
Joseph Tam <jtam.h...@gmail.com>
