[Dovecot] problem with dovecot lmtp via director

[Piotr Rotter]

Hello,

I have strange problem with delivering mails via dovecot lmtp via 
director and i have not idea what is wrong.

After server restart bigger mails does not delivered.

Postfix servers log that:

2013-04-04T19:55:38.919624+02:00 kurier9 postfix/lmtp[16620]: 
3ZhWF337X5z89h3: to=<piotr.rotter at active24.pl>, 
relay=192.168.67.1[192.168.67.1]:24, delay=1987, delays=1987/0/0/0.04, 
dsn=4.3.0, status=deferred (host 192.168.67.1[192.168.67.1] said: 451 
4.3.0 Temporary internal failure (in reply to end of DATA command))

2013-04-04T19:58:41.238926+02:00 kurier9 postfix/lmtp[16620]: 
3ZhWF337X5z89h3: to=<piotr.rotter at active24.pl>, 
relay=192.168.67.1[192.168.67.1]:24, delay=2170, delays=1990/0/0/180, 
dsn=4.4.2, status=deferred (conversation with 192.168.67.1[192.168.67.1] 
timed out while sending message body)


Director server log something like that:

2013-04-04T20:00:45+02:00 r1 dovecot: lmtp(18447): Disconnect from 
192.168.67.24: Temporary internal failure (in DATA)

Dovecot servers log that:

2013-04-04T20:03:37.347279+02:00 k1 dovecot: lmtp(9380): Disconnect from 
192.168.111.1: Connection closed (in RCPT TO)

Please help because I have not idea what is wrong and queue growing up.

Best regards
Piotr Rotter