Malformed LMTP response

[Gerald Griessner]

Hi,
I'm using exim / cyrus as out mail setup.
There are strange messages in the  exim mail log:
 R=localuser T=local_delivery defer (-1): Malformed LMTP response after 
end of data: :\365\034Z\026a\252\324

here are the relevant parts of the configuration:
* cyrus.conf
 SERVICES {
   imap          cmd="imapd" listen="127.0.0.1:imap" prefork=0
   imaps         cmd="imapd -s" listen="imaps" prefork=0
   pop3s         cmd="pop3d -s" listen="pop3s" prefork=0
   sieve         cmd="timsieved" listen="sieve" prefork=0
   lmtpunix      cmd="lmtpd" listen="/var/state/lmtp/socket" prefork=0
 }
* exim.conf
 localuser:
   driver = accept
   check_local_user
   transport = local_delivery
   cannot_route_message = Unknown user
* local_delivery:
   driver = lmtp
   socket = /var/state/lmtp/socket
   transport_filter = /usr/bin/tr -d \\000
   batch_max = 20
* Versions:
   Cyrus IMAPD v2.1.16
   Cyrus SASL  2.1.17
   Berkeley DB 3.3.11
   CMU Sieve 2.2
   Exim  4.40

Does anybody have any hint?
Cheers
  Gerald
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