Seems like we had a similar issue when we applied SP2 also. In our scenario, we sit behind an ISA firewall. We had to set the ISA firewall as a DNS caching server and set our internal DNS servers to use it as a forwarder. If I remember correctly, this was how we resolved this issue. Rodney -----Original Message----- From: Nikolaj7 [mailto:nikolaj@xxxxxxxxxx] Sent: Wednesday, February 27, 2002 12:24 PM To: [ExchangeList] Subject: [exchangelist] Post Exchange SP2 problems http://www.MSExchange.org/ Hi, I had a running system running Exchange 2000. I upgraded to SP2 and now I am unable to send mails out of the company to an external mail adress. I am able to send and receive on the internal network. I am able to receive mail from external net. Any ideas? Nikolaj ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: harris@xxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')