"Mailbox does not exist" error with multiple recipients msgs

[Antonio Alberto Lobato <tomlobato@ig.com.br>]

	Hi all,

	Im using Postfix 1.1.11 (from backport) and Cyrus 21 
(from people.debian.org). When users send mails to multiple 
recipients, mails arrives normaly but sender receives a error mail 
message saying it cant be delivered because "Mailbox does not exist".
Please look error from /var/log/syslog:

log----

Feb 28 22:57:10 mobile postfix/pipe[2672]: 1DF9649EDB: 
to=<asd@unicx.com.br>, orig_to=<asd>, relay=cyrus, delay=0, 
status=bounced (data format error. Command output: : Mailbox does not
exist )
Feb 28 22:57:11 mobile postfix/pipe[2672]: 1DF9649EDB: 
to=<teste@unicx.com.br>, orig_to=<teste>, relay=cyrus, delay=0, 
status=bounced (data format error. Command output: : Mailbox does not
exist )

log----

	It is worth to note that these mailboxes _does_ exists, so, 
if sending to single mailboxes, one each time, it gets no error.
	
	Some light?


	Thanks
	Tom