exchange 2010 verify recievers

We upgrade from exchange 2007 to 2010 and started getting unverified address. I notice when i turn off verify recievers then it works. this worked in 2003 and 2007, so probably something on exchange side just not sure how to enable it again..

thanks
 
ask your exchange admin.
 
Just as a follow up, we had to enable the anti-spam features of Exchange 2010, they have a filter active directory option like 2003/2007, however the results were still failing from proxmox so we had to disable this feature. We did not have the server LDAP integrated or anything like that ...

Thanks
 
the procedure for exchange 2010sp1 is more or less the same as for exchange 2007 (this one is described in the doc´s). works here.