[Exim] deliverin with exim and cyrus

Hi *,
I'm trying out cyrus-imapd 2.0.16 and exim 3.30.2 on a SuSE-Linux 7.2
Sending emails on my machine to myself as user bran, I get the following
errors in exim-log:

exim 3.30 daemon started: pid=4158, -q30m, listening for SMTP on port 25
173ibV-00011u-00 == pine-count@??? \
routing defer (-42): retry time not reached

173ieR-000150-00 Message is frozen
173iSQ-0000yX-00 Message is frozen

173t2a-00017d-00 <= bran@??? H=linux.home.br [192.168.1.1] \
P=asmtp A=plain_PLAIN:bran S=578 id=3CD37FB4.C465DF41@???

173t2a-00017d-00 ** bran@???: unknown local-part "bran" in domain "linux.home.br"
173t2a-00017f-00 <= <> R=173t2a-00017d-00 U=root P=local S=1385
173t2a-00017f-00 ** bran@???: unknown local-part "bran" in domain "linux.home.br"
2002-05-04 08:29:08 173t2a-00017f-00 Frozen (delivery error message)
2002-05-04 08:29:08 173t2a-00017d-00 Error message sent to bran@???
2002-05-04 08:29:08 173t2a-00017d-00 Completed

What's going wrong?

thx
Toni