Importing existing mail into ISPConfig 3
Is there perhaps a way to import existing mail messages into a new ISPConfig installation?
I have an Ubuntu web server with mail setup on the server. There is no control panel installed and everything gets done through the terminal. The email is located in some kind of flat file configuration in each users folder on the server.
I inherited this server with the configuration and would like to move to ISPConfig but I cannot lose the existing emails on the server. Can someone please give me some advice on how I can get this setup into the 21st century where it is manageable?