I have old dovecot server: (# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf

Pigeonhole version 0.4.21 (92477967)

OS: Linux 4.14.15-3.el7xen.x86_64 x86_64 CentOS Linux release 7.4.1708

(Core)

and new dovecot server:

2.3.1 (c5a5c0c82): /etc/dovecot/dovecot.conf

Pigeonhole version 0.5.devel (61b47828)

OS: Linux 4.14.47-5.el7xen.x86_64 x86_64 CentOS Linux release 7.5.1804

(Core)

I try to sync old server with doveadm sync with parameter -N (Synchronize all the available namespaces)

Sync successfull in log, but destination server in log have "Can't create mailbox mail_public/public: Permission denied."

Config dumps, logs in attaches.