All outgoing emails are bouncing immediately back to the administrator account.
Environment: 2003 DC with Exchange 2003, doing NAT over DSL router. Two nic´s
Second 2003 Server for DFS and AD replication even DC.
One 2000 terminal server.
One 2003 member server for testing purpose.
Only one error in event log while starting up the server: ID 3019 while trying to reconnect a share on Linux samba.
DNS forwarding is ok. Receiving emails works fine. (POPBeamer collecting and forwarding to MSX)
Sending emails to outside accounts over telnet using the SMTP connector on the test server works fine.
ONLY sending emails over the SMTP on the exchange server bounces all the mails back to the administrator account. Sending emails within outlook to external addresses won’t work.
I tried both: the virtual SMTP server and the connector, for each test I did a fresh restart.
Any Help is appreciated