[Dovecot] Log sybnch error

[Stephen Davies]

My mail log has many entries like:

Mar  2 12:34:13 server dovecot: imap(john): Error: Log synchronization error 
at seq=2,offset=4264 for /home/john/Mail/INBOX/.imap/SMS Emails/dovecot.index: 
Extension header update points outside header size

Version 2.1.1

dovecot -n gives:
# 2.1.1: /usr/etc/dovecot/dovecot.conf
# OS: Linux 2.6.33.5-desktop-2mnb i686 Mandriva Linux 2010.2 
mail_access_groups = mail
mail_privileged_group = mail
passdb {
  driver = pam
}
protocols = pop3 imap
service anvil {
  chroot = empty
  client_limit = 0
  drop_priv_before_exec = no
  executable = anvil
  extra_groups = 
  group = 
  idle_kill = 4294967295 secs
  privileged_group = 
  process_limit = 1
  process_min_avail = 1
  protocol = 
  service_count = 0
  type = anvil
  unix_listener anvil-auth-penalty {
    group = 
    mode = 0600
    user = 
  }
  unix_listener anvil {
    group = 
    mode = 0600
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service auth-worker {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = auth -w
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 1
  type = 
  unix_listener auth-worker {
    group = 
    mode = 0600
    user = $default_internal_user
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service auth {
  chroot = 
  client_limit = 0
  drop_priv_before_exec = no
  executable = auth
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener auth-client {
    group = 
    mode = 0600
    user = 
  }
  unix_listener auth-login {
    group = 
    mode = 0600
    user = $default_internal_user
  }
  unix_listener auth-master {
    group = 
    mode = 0600
    user = 
  }
  unix_listener auth-userdb {
    group = 
    mode = 0666
    user = 
  }
  unix_listener login/login {
    group = 
    mode = 0666
    user = 
  }
  user = root
  vsz_limit = 18446744073709551615 B
}
service config {
  chroot = 
  client_limit = 0
  drop_priv_before_exec = no
  executable = config
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = config
  unix_listener config {
    group = 
    mode = 0600
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service dict {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = dict
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener dict {
    group = 
    mode = 0600
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service director {
  chroot = .
  client_limit = 0
  drop_priv_before_exec = no
  executable = director
  extra_groups = 
  fifo_listener login/proxy-notify {
    group = 
    mode = 00
    user = 
  }
  group = 
  idle_kill = 4294967295 secs
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener director-admin {
    group = 
    mode = 0600
    user = 
  }
  unix_listener login/director {
    group = 
    mode = 00
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service dns_client {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = dns-client
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener dns-client {
    group = 
    mode = 0666
    user = 
  }
  unix_listener login/dns-client {
    group = 
    mode = 0666
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service doveadm {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = doveadm-server
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 1
  type = 
  unix_listener doveadm-server {
    group = 
    mode = 0600
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service imap-login {
  chroot = login
  client_limit = 0
  drop_priv_before_exec = no
  executable = imap-login
  extra_groups = 
  group = 
  idle_kill = 0
  inet_listener imap {
    address = 
    port = 143
    ssl = no
  }
  inet_listener imaps {
    address = 
    port = 993
    ssl = yes
  }
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = imap
  service_count = 1
  type = login
  user = $default_login_user
  vsz_limit = 18446744073709551615 B
}
service imap {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = imap
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 1024
  process_min_avail = 0
  protocol = imap
  service_count = 1
  type = 
  unix_listener login/imap {
    group = 
    mode = 0666
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service indexer-worker {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = indexer-worker
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 10
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener indexer-worker {
    group = 
    mode = 0600
    user = $default_internal_user
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service indexer {
  chroot = 
  client_limit = 0
  drop_priv_before_exec = no
  executable = indexer
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener indexer {
    group = 
    mode = 0666
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service ipc {
  chroot = empty
  client_limit = 0
  drop_priv_before_exec = no
  executable = ipc
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener ipc {
    group = 
    mode = 0600
    user = 
  }
  unix_listener login/ipc-proxy {
    group = 
    mode = 0600
    user = $default_login_user
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
service lmtp {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = lmtp
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = lmtp
  service_count = 0
  type = 
  unix_listener lmtp {
    group = 
    mode = 0666
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service log {
  chroot = 
  client_limit = 0
  drop_priv_before_exec = no
  executable = log
  extra_groups = 
  group = 
  idle_kill = 4294967295 secs
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = log
  unix_listener log-errors {
    group = 
    mode = 0600
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service pop3-login {
  chroot = login
  client_limit = 0
  drop_priv_before_exec = no
  executable = pop3-login
  extra_groups = 
  group = 
  idle_kill = 0
  inet_listener pop3 {
    address = 
    port = 110
    ssl = no
  }
  inet_listener pop3s {
    address = 
    port = 995
    ssl = yes
  }
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = pop3
  service_count = 1
  type = login
  user = $default_login_user
  vsz_limit = 18446744073709551615 B
}
service pop3 {
  chroot = 
  client_limit = 1
  drop_priv_before_exec = no
  executable = pop3
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 1024
  process_min_avail = 0
  protocol = pop3
  service_count = 1
  type = 
  unix_listener login/pop3 {
    group = 
    mode = 0666
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service ssl-params {
  chroot = 
  client_limit = 0
  drop_priv_before_exec = no
  executable = ssl-params
  extra_groups = 
  group = 
  idle_kill = 0
  privileged_group = 
  process_limit = 0
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = startup
  unix_listener login/ssl-params {
    group = 
    mode = 0666
    user = 
  }
  user = 
  vsz_limit = 18446744073709551615 B
}
service stats {
  chroot = empty
  client_limit = 0
  drop_priv_before_exec = no
  executable = stats
  extra_groups = 
  fifo_listener stats-mail {
    group = 
    mode = 0600
    user = 
  }
  group = 
  idle_kill = 4294967295 secs
  privileged_group = 
  process_limit = 1
  process_min_avail = 0
  protocol = 
  service_count = 0
  type = 
  unix_listener stats {
    group = 
    mode = 0600
    user = 
  }
  user = $default_internal_user
  vsz_limit = 18446744073709551615 B
}
ssl_cert = </etc/pki/tls/certs/dovecot.pem
ssl_key = </etc/pki/tls/private/dovecot.pem
userdb {
  driver = passwd
}

-- 
=============================================================================
Stephen Davies Consulting P/L                             Voice: 08-8177 1595
Adelaide, South Australia.                                Fax  : 08-8177 0133
Records & Collections Management.                         Mobile:040 304 0583