I was looking for a variable option to import MBOX files into an email account. I came across many free solutions like using Thunderbird with Import/Export NG tools for Windows devices or you can also use Apple Mail client for Mac devices. The process was very tedious. Some configurations did not go through. I cannot even imagine dealing with data in bulk, and there were lots of ambiguities and inconsistencies. Then i came across RecoveryTools MBOX Converter - it is secure, follows compliance, direct and easy to use applications that function on mac & windows - it preserver email integrity, highly secure used modern OAuth has overcome bandwidth limites and imposed no limitation in MBOX data to be imported.