Question on Outgoing Broadcast IP Address when sending emails outside

[madhusd]

I have two email servers, one is a Exchange 5.5, which we are just about to put to rest and the other is a Exchange 2003. Both these are integrated together and we receive mails on both these domains. (two seperate SMTP domains for both the servers). However, I recently stopped the SMTP service on our old Exchange server (5.5) because we don't want to receive anymore emails on that. But our outgoing emails still show that email is being sent from our old SMTP IP Address. (Although it shows the right domain name). This is causing all sorts of problems and was wondering if anyone could help me here.

All help is greatly apprciated.