Is it possible to configure the IP address the ActiveSMS SMTP server will bind to. I have a mail server running on the same machine which is also listening on port 25.

To configure SMTP Binding IP address:

1) Download the following file:
http://www.intellisoftware.co.u...WSetListeningAddress.zip 

2) Extract the ActiveSMS_EmailGWSetListeningAddress.reg

3) Right-click the extracted ActiveSMS_EmailGWSetListeningAddress.reg file and set the binding address to the require value.
e.g. "EmailGWOutgoingSMTPListeningAddress"="111.222.333.444"

4) Select File->Save

5) Double click the ActiveSMS_EmailGWSetListeningAddress.reg file. Click 'Yes' to accept changes.

6) Reboot the server