Primary reasons for this.
1. AV blocking local SMTP traffic. McAfee is notorious for this.
2. Smart host on the SMTP virtual server, rather than on an SMTP Connector.
3. Something else blocking SMTP traffic.
Verify that the servers can see each other on port 25 by IP address, netbios and FQDN.
If they are not in the same routing group (there is only one by default and you have to move them so it isn’t something that happens by accident) then create a routing group connector.
MVP: Exchange, MCSE
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From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Gene Sibbs
Sent: 21 July 2010 10:01
Subject: [ExchangeList] Additional Exchange 2003 Server
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!