[exim] Unknown user due to DNS problem

Hi guys,

since the beginning of Aprile i have problems with my Exim 4.33.
I have problem in outbound and inbound... like this:

2005-05-04 12:56:35 1DTHYP-0004zb-EF <= myemail@??? H=(mymailserver)
[192.168.1.1] P=esmtp S=10091
id=220A28927CE0E745ACE75A8B351EE97C514C74@mymailserver
2005-05-04 12:56:40 1DTHYP-0004zb-EF ** example@???: Unknown user
2005-05-04 12:56:40 1DTHYP-0004zb-EF Completed
2005-05-04 12:56:40 1DTHYW-0004zj-GU <= <> R=1DTHYP-0004zb-EF U=exim P=local
S=10924
2005-05-04 12:56:41 1DTHYW-0004zj-GU => myemail@??? R=local
T=internal_smtp H=192.168.1.1 [192.168.1.1]
2005-05-04 12:56:41 1DTHYW-0004zj-GU Completed

That domain works without problems..

And in inbound is gonig bad... i\'m losing email...

2005-05-03 15:37:15 H=(vsmtp11.tin.it) [212.216.176.187] sender verify fail
for user@???: Unknown user
2005-05-03 15:37:15 H=(vsmtp11.tin.it) [212.216.176.187] F=user@???
rejected RCPT myemail@???: Sender verify failed

I haven\'t received anything and sender too!!!

I\'ve tried Exmi 4.50 but without luck.

Any ideas please?

Tnx
Riccardo
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