Hi!
I'm struggling with the following error: Aug 4 21:32:00 mx02 dovecot: imap(x...@xxx.tld)<17693><w14vpU+PCCSwPxpo>: Error: Mailbox INBOX: Broken file /home/vmail/xxx.tld/xxx/dovecot-uidlist line 6246: Invalid data: Aug 4 21:49:22 mx02 dovecot: imap(x...@xxx.tld)<21879><YNhW40+PLoBOGLlU>: Error: Mailbox INBOX: Broken file /home/vmail/xxx.tld/xxx/dovecot-uidlist line 6249: Invalid data: It seems the first part is not incremented properly and sometimes it has a jump in it, like the line 6246: 18810 :1564935891.M816284P8904.mx01.m.ininet.hu,S=12145,W=12409 18812 :1564947092.M542714P2651.mx01.m.ininet.hu,S=12275,W=12517 Even though I deleted all the dovecot* files the error comes back. I have the maildirs through NFS, but I set to store the INDEX files locally. I have failover configuration, that means when one of my servers die another one takes the active IP and start to serve dovecot users, so its always one server that serves all the users, no load balacing. Any idea what am I missing or how could I fixed this problem? uname -a Linux mx02.m.mydomain.tld 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5 (2019-06-19) x86_64 GNU/Linux dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-5-amd64 x86_64 Debian 10.0 nfs # Hostname: mx02.m.mydomain.tld auth_mechanisms = plain login auth_verbose = yes default_client_limit = 10000 default_process_limit = 1000 dict { quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no mail_fsync = always mail_location = maildir:/home/vmail/%d/%n:INDEX=/var/indexes/%d/%n mail_plugins = " quota" mail_privileged_group = mail mmap_disable = yes namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX. separator = . type = private } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = dict:User quota::proxy::quota sieve = /home/vmail/default.sieve sieve_default = /home/vmail/default.sieve sieve_extensions = +editheader sieve_global_dir = /var/lib/dovecot/sieve } protocols = " imap pop3" service auth-worker { user = vmail } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0600 user = vmail } user = $default_internal_user } service dict { unix_listener dict { group = vmail mode = 0600 user = vmail } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service imap { process_limit = 1024 } service pop3 { process_limit = 1024 } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/postfix/ssl/mail.mydomain.tld-dovecot.crt ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lda { mail_plugins = " quota sieve" } protocol imap { mail_max_userip_connections = 20 mail_plugins = " quota quota imap_quota" } protocol pop3 { mail_max_userip_connections = 20 mail_plugins = " quota quota" } Thanks, Balazs