hello did you have some news ? I test again today
Sep 04 21:40:42 imap(julien@XXXXX.com)<108><J+iXca1aNoIqAoQAByIABgACAAAAAAAK>: Panic: file quota.c: line 516 (quota_root_is_visible): assertion failed: (box->list->ns->type == MAIL_NAMESPACE_TYPE_SHARED) Sep 04 21:40:42 imap(julien@XXXXcom)<108><J+iXca1aNoIqAoQAByIABgACAAAAAAAK>: Error: Raw backtrace: libdovecot.so.0(backtrace_append+0x39) [0x7f5fb05f6229] -> libdovecot.so.0(backtrace_get+0x22) [0x7f5fb05f6362] -> libdovecot.so.0(+0x14ff3c) [0x7f5fb0604f3c] -> libdovecot.so.0(+0x14ffd1) [0x7f5fb0604fd1] -> libdovecot.so.0(+0x6e46f) [0x7f5fb052346f] -> lib10_quota_plugin.so(+0x5c37) [0x7f5fb0071c37] -> lib10_quota_plugin.so(quota_try_alloc+0x14d) [0x7f5fb007528d] -> lib10_quota_plugin.so(+0xda6d) [0x7f5fb0079a6d] -> libdovecot-storage.so.0(mailbox_save_finish+0x71) [0x7f5fb0957ee1] -> libdovecot-storage.so.0(mail_storage_copy+0xc4) [0x7f5fb0946d44] -> lib95_imap_sieve_plugin.so(+0x8197) [0x7f5fb0056197] -> lib10_quota_plugin.so(+0xe0df) [0x7f5fb007a0df] -> lib01_acl_plugin.so(+0xe38d) [0x7f5fb009838d] -> libdovecot-storage.so.0(+0x6b25d) [0x7f5fb095825d] -> libdovecot-storage.so.0(mailbox_move+0x5e) [0x7f5fb095840e] -> imap(+0x170ef) [0x559772e490ef] -> imap(command_exec+0xa4) [0x559772e58774] -> imap(+0x24350) [0x559772e56350] -> imap(+0x243e4) [0x559772e563e4] -> imap(+0x2466b) [0x559772e5666b] -> imap(client_handle_input+0x1d5) [0x559772e56ad5] -> imap(client_input+0x73) [0x559772e57093] -> libdovecot.so.0(io_loop_call_io+0x67) [0x7f5fb061e817] -> libdovecot.so.0(io_loop_handler_run_internal+0x13b) [0x7f5fb061ff8b] -> libdovecot.so.0(io_loop_handler_run+0x50) [0x7f5fb061e8c0] -> libdovecot.so.0(io_loop_run+0x48) [0x7f5fb061eac8] -> libdovecot.so.0(master_service_run+0x17a) [0x7f5fb056a9aa] -> imap(main+0x3f6) [0x559772e467c6] -> libc.so.6(+0x29ca8) [0x7f5fb02eaca8] -> libc.so.6(__libc_start_main+0x85) [0x7f5fb02ead65] Sep 04 21:40:42 imap(julien@XXXXX)<108><J+iXca1aNoIqAoQAByIABgACAAAAAAAK>: Fatal: master: service(imap): child 108 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set /proc/sys/fs/suid_dumpable to 2)