Let me try this again.... Overview: We have one Exchange 2000 server we are trying to replace that is currently exposed (public IP - this is bad... we know). We have just added a new Exchange 2000 server that is on a private IP and behind an MS ISA firewall only box. We have only migrated a couple of email accounts from the old Exchange server to the new one for testing and are experiencing problems when sending to those accounts. We can send internally to any email account without problem, as well as send mail externally without problem. We are unable to send mail to any of the users that we migrated to the new Exchange server, when we try we get the following error: Your message did not reach some or all of the intended recipients. Subject: FW: Welcome to the ISAserver.org Discussion List Sent: 8/19/2003 9:33 AM The following recipient(s) could not be reached: dave@xxxxxxxxxxxxxxxxxxx on 8/19/2003 9:33 AM You do not have permission to send to this recipient. For assistance, contact your system administrator. <exodus.tmfi.com #5.7.1 smtp;550 5.7.1 Unable to relay for test_user@xxxxxxxxxxxxx> ISA configuration: We have published our Exchange server using the Secure Mail Server publishing wizard. Users are able to access the internet. Protocol Rules allow for DNS Query and DNS Zone Transfers and SMTP to travel out IP Packet Filters configured for SMTP inbound and SMTP outboud (individual filter entries) Other configuration info: The Exchange server has a private IP and is configured with DNS services. The NIC DNS entry points to itself and the DNS service is configured to forward to our ISP's DNS server. The default gate way is the private IP of the ISA box. The recipient policy used for the user accounts having problems is the default for our domain. Any ideas why we are having his problem? Thanks - Dave -----Original Message----- From: Roberts Phillip (IBM) [mailto:phillip.roberts@xxxxxxxxxxx] Sent: Tue 8/19/2003 9:51 AM To: [ExchangeList] Cc: Subject: [exchangelist] RE: Unable to send crisis http://www.MSExchange.org/ Wow.. That is a crisis.. Language packs? Phillip B. Roberts Network Administrator Thomson Circleville Glass Operations 24200 U.S. Route 23, South / Circleville, OH 43113-9002 Ph: 740-420-6784 (x6784) / Fx: 740-420-6511 / Cell: 740-571-1412 (x5306) / phillip.roberts@xxxxxxxxxxx _____ Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email.