We were using a Linux PostFix email server for an internal mail server. It had been working fine but recently started acting weird when we were trying to connect with some iPhones. Sometimes they would work and other times it would say server unavailable. Tried multiple things to fix with no solution. We finally decided to switch off the PostFix server and go to GoDaddy. All of the users use Thunderbird for the email client. On each machine a new account was created to attach to the GoDaddy email. The old account was left so the user could still access old emails if necessary. The problem is the old inbox still gets email from all the local users. That I can find, there is no way to disable this account while still giving them access to their old email. I tried changing the account settings on the old email account to point to a server that did not exist. Strangely, when you sent an email using the new GoDaddy account, Thuderbird wanted to save the sent mail in the old accounts sent mail folder. This even happened when the GoDaddy account was set to the default account. I am looking for a way to get the system to understand that the new GoDaddy account is the primary default account and not to use the old account for anything. Does anyone have any ideas how this can be accomplished. Any help is greatly appreciated.