We have just moved from Exchange 2003 to Exchange 2010, and outgoing (SMTP) mail is not working from the SDP On-Demand application.

 

We need to open up port 25 on our firewall so the application can talk to our Exchange 2010 server, but would like to lock down the firewall access to either a single IP or a block of IPs as used by the SDP On-Demand servers.

 

Is is possible to get a note of these addresses, so we can get this working?

 

Thanks

 

Doug.