You have to start troubleshooting things in a sequence. Did the email leave the client's outbox folder. Are the emails stuck in a q on the newly introduced server. Can users send email to one another where they are both housed on the new server? How did you install the new server? How did you introduce this server to the exchange org? Regards Sarbjit From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Gene Sibbs Sent: Wednesday, July 21, 2010 5:00 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Additional Exchange 2003 Server Hi Exchange Experts, I added one more exchange 2003 server onto an exchange 2003 org. Now I have Ex01 and Ex02. My problem is that the users whose mailboxes are housed on newly introduced exchange 2003 (Ex02) are not able to send/receive emails. What configs do I need to quickly fix this ASAP! Thanks