[IMail Forum] help! duplicates

[Court Kizer]

I created an virtual email server (it has a private ip) but the client needed the domain name changed so i went to the add new box and changed it and when it asked if i was creating a new one i selected "NO" now there are two domain names with the same ip and when i choose to delete them it tells me it can't! How do i get rid of this so i can start clean with this IP?