Cyrus murder and unknown mailboxes

[Vladimir Nikolic]

Hi,

with standalone cyrus imap server lmtp connections for unknown users 
were bounced with following error:

status=bounced (host xxx said: 550-Mailbox unknown.  Either there is no 
mailbox associated with this 550-name or you do not have authorization 
to see it. 550 5.1.1 User unknown (in reply to RCPT TO command))

Now we have cyrus murder configuration and those mails are not bounced 
by frontend server, instead they are queued on postfix server with 
following error:

relay=xxx:24, delay=259650, delays=259650/0.05/0.02/0, dsn=4.4.2, 
status=deferred (lost connection with xxx while sending MAIL FROM)

On frontend server log there is a record about this connection:

xxx lmtp[23162]: login: xxx cyrus_user DIGEST-MD5 User logged in
xxx master[21353]: service lmtp pid 23162 in BUSY state: terminated 
abnormally

We would like to see that those mails are rejected by frontend like they 
have been rejected by standalone cyrus imap server.

Regards,
Vladimir