I have a project for a small business that's interested in moving their hosted email from Godaddy to a internal network server running Zimbra. I plan on securing a public IP from their ISP to be used as the A/MX record assignment under Godaddy's DNS zone editor, but I'm unsure what will happen once the switch is made with how Zimbra will be able to map user accounts from the existing Godaddy accounts. I'm looking for anyone that might have advice/experience with migrating a Godaddy hosted account to a standalone Zimbra host, or help point me to documentation that guides through this process. Any help would be fantastic. Thanks!