I successfully installed ISPConfig and have set up a reseller, a few customers, websites and some (already active) e-mail users.
During the ISPConfig install I selected https (SSL) as the connection method to my server.
Now I find out that when I'm not on my LAN (in the office) I cannot access my server at port 81 and suspect that the firewall settings have something to do with it. So I want to change the server to non-SSL in order to test this (and to access my webmail
Question: can I do this or do I need to reinstall ISPConfig (using partial deinstallation). Which leads to the question around mail users; will their mailboxes be preserved as well with partial deinstallation. The reason why I'm ask is that my current users have IMAP access and I don't want to lose those emails