users are unable to send mail addressed to a mail enabled public folder from external mail accounts. They have no problem sending the public folder mail if they are on our priviate network. They are however, able to send mail to users inside the private network using external mail accounts, I'm able to send mail from my hotmail account to my work account. The very vague NDR appears, Reporting-MTA: dns;atlexch.*.com Received-From-MTA: dns;*.com Arrival-Date: Tue, 1 Nov 2005 13:58:40 -0500 Final-Recipient: rfc822;*@transcore.com Action: failed Status: 5.2.1 X-Display-Name: * thank you,