I have such a problem: There are 2 mail addresses in exchange (name1@domain.com & name2@domain.com). The first address was forwarded to the second. After we deleted a user account in AD, connected with name1@domain.com. A few month later we created a new user account with the same address name1@domain.com. And strangely it is forwarding to name2@domain.com, although we didn't set any forwarding options now. Where can be the problem? User profiles are new, using Get-TransportRule returns an empty string. Any ideas?

Check Forwarding is set on Mailbox level http://technet.microsoft.com/en-us/library/dd351134.aspx -- Check is there any Outlook rule To forward Mails -- Check is there any Transport Rule Neglect if already Checked-- ---- Also make Sure DC replication is fine repadmin /syncall /Aepdq The above 3 can be the only criteria Exchange to forward emails to other mailbox . Satheshwaran Manoharan | Exchange 2003/2007/2010 | Blog:http://www.careexchange.in | Please mark it as an answer if it really helps you