I know it is very tricky query I have one Security Distribution List “all abc” for organization abc, some users set the forwarding their mailbox for other domain “@xyz” when we are sending email to DL “all abc” it forward on “@xyz” email address for some users. My query : Can we stop the forwarding to other domain if I send email to DL “all abc” without removing the forwarding on their mailbox. Dinesh

You havent stated the Exchange version but the concept is the same for every version If users are creating Outlook rules to forward messages you can prevent that by ensuring that auto-forwards are not allowed under the Message Format Settings per: http://technet.microsoft.com/en-us/library/aa996309(EXCHG.80).aspx If the forwarding is being done at the account level, then this setting wont prevent that and you need to remove the forwarding on the accout.

What is ur environment?If if it is 2k7 then create transport rule and make it happen. -bpara