Hi, everyone We got 3 servers cyrus, one master, two cascades of slaves. The master sync to the first slave, and the first slave sync to the last slave. No imap connexion on the slaves, just for backup. Since sometime (lets say 1 month) very often I got a problem with the sync, it's just stop, sometime the sync daemon just crash, sometime the /var/imap/sync/PROC_ID/ seem just loop on something, it's been fill in by the daemon with lots of email, then all email disappear (I guest move somewhere), then the fill in come again with mostly same email I need to restart the imapd, clean up the /var/imap/sync/log/log-run and after 3, 4 or maybe more time it's working again. But the problem come back after sometime. The error message are someting like Nov 8 12:21:10 CYRUS-SLAVE imap[48415]: Mailbox uniqueid changed user.USER_NAME.Trash (ipshztx10dchdcucwbivivyb => +v9svnpnikhlmyrb5o50m2k1j) - retry Nov 8 12:21:10 CYRUS-MASTER sync_client[18879]: do_folders(): update failed: user.USER_NAME.Trash 'The remote Server(s) denied +the operation' What the f*k that's mean ? I didn't change anything. I'm running : cyrus-imapd30-3.0.14 on FreeBSD 12.0. I check on the slave, everything work fine, lots of disk space, no cpu problem, no network probelm. Any idea ? Regards. -- Albert SHIH DIO bâtiment 15 Observatoire de Paris 5 Place Jules Janssen 92195 Meudon Cedex France ☏ +33 1 45 07 76 26/+33 6 86 69 95 71 xmpp: jas@xxxxxxxx Heure local/Local time: Sun Nov 8 06:30:02 PM CET 2020 ------------------------------------------ Cyrus: Info Permalink: https://cyrus.topicbox.com/groups/info/T8ac0e6c2dfeef715-M1b333f23d487fc07177cab22 Delivery options: https://cyrus.topicbox.com/groups/info/subscription