Hello everyone. I am new to Exchange 2007. I have a problem with forwarding rules. When a user has a rule that forward specific email (for example a mail with the sabject "fax") to a user he gets an error "unknown error" and the rule doesnt work. I tried: create a new rule start outlook with /clearrules attribute from another client now those things might help you : It is only when i am trying to forward toa person , rules tofolders work fine there is only one rule (i heard about the 32kb limit) forwarding to a person inside my organization and outside is the same so it is not a problem with the global address list. transport rules on the server work fine but i dont want to put rules there if the user press the run rule now button it works. i heard that there is an option to block email forwarding on the server but i can't find it. thank you for your help Ophir