Changing the IP Address of a Host

---

Before changing the IP address of a domain, back up your IMail registry to a file with the IMail Backup tool or with regedit.

To backup your IMail registry with IMail Backup tool:

1. Start IMail Administrator and select localhost in the left panel.
2. Click the General tab.
3. Click Backup. The Registry Backup/Restore dialog box appears.
4. Enter a filename in the Filename box, then click Backup.

To backup your IMail registry with regedit:

1. Click Start > Run, the Run dialog box appears.
2. In the Open box, enter regedit. The Registry Editor opens.
3. Locate the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\IMail\Domains 
   

4. Right click the above registry entry, then select Export. The Export Registry File dialog box appears.
5. Navigate to the folder you want to save the file in, enter a file name in the File name box, then click Save.

To change the host IP address:

Caution: Changing registry settings can damage your software settings. Be careful to change only the settings described in the instructions below. Make sure that you have stopped all IMail services and closed IMail Administrator before changing the host IP address in the registry.

1. If you have not done so, bind the new IP address to the Network Interface Card (NIC) in Control Panel > Local Area Connections > Properties > Internet Protocol (TCP/IP) > Properties.
2. Run Regedit and locate the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\IMail\Domains 
   

3. If you see keys for both the old and the new IP addresses, delete the old one. First, make sure that the "Official" value under the new IP address key shows the correct hostname. If you only see a key for the old IP address you can rename that key to the new IP address.
4. Highlight the hostname key associated with that IP address, and make sure its "address" value is set to the correct (new) IP address for that host.
5. Stop and restart all services.

Ipswitch, Inc. http://www.ipswitch.com

©Ipswitch 2005