Sorry for my bad English I have an Exchange 2007 sp3 that comes from a migracon of an Exchange 2003 environment. I find that surprise all users have permissions to send as (send as) from all users. Verifying from the EMC no one has permissions to send, if I released the following script in the Exchange console I get the following: Get-Mailbox | Get-ADPermission | where {($_.)}(ExtendedRights_-like_"*send-as*")} | FT - Wrap Identity User Deny Inherited Rights -------- ---- ---- --------- ------ domain.es/users/User1 NT AUTHORITY\SELF False False Send-As domain.es/users/User2 NT AUTHORITY\SELF False False Send-As And so a line for all users. Users Users are not neither Exchange admins, or domains admins. They are normal domain users. Any ideas, thanks?

Anything set on the database? Pick one user and check what permissions are set there for send-as, could be a domain group.Sukh

All is correct in the database. I check permissions in users, and the send as is not check. Users are domain users only.