[Dovecot] Dovecot replication, no updates on message deposit

[Milan Cvetkovic]

Hi,

I am trying to setup dovecot replication based on:

http://wiki2.dovecot.org/Replication

All mailboxes share the same UNIX userid ('vmail'), and I setup ssh-key 
based login for this account in both directions. As LDA exim4 is 
configured to use dovecot deliver LDA. Here is the relevant config from 
exim:

/usr/lib/dovecot/deliver -d $local_part -f $sender_address -a 
$original_local_part@$original_domain


When a message is deposited to a mailbox, it does not get replicated. 
The log is silent:

Mar 25 15:00:20 mx02 dovecot: master: Dovecot v2.2.9 starting up (core 
dumps disabled)
Mar 25 15:01:05 mx02 dovecot: lda(user.name): msgid=unspecified: saved 
mail to INBOX

The output from doveconf -n is attached.

Any help is appreciated,

Thanks, Milan.
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# 2.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.4 
auth_mechanisms = plain login
mail_location = maildir:~/Maildir
mail_plugins = " notify replication"
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
plugin {
  mail_replica = remote:vmail at 192.168.108.136
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = " imap sieve pop3"
replication_full_sync_interval = 1 hours
service aggregator {
  fifo_listener replication-notify-fifo {
    user = vmail
  }
  unix_listener replication-notify {
    user = vmail
  }
}
service auth {
  unix_listener auth-client {
    mode = 0660
    user = Debian-exim
  }
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0600
  }
}
ssl_cert = </etc/exim4/exim.crt
ssl_key = </etc/exim4/exim.key
userdb {
  driver = prefetch
}
userdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
protocol lda {
  mail_plugins = " sieve"
}