Hello my name is Nikos and Im working on the Linux server administration field for the past 6 years. Over these years I worked for two web hosting companies as a Senior Administrator managing their servers & providing customer support. I have extensive experience with the following control panels: CPanel, Plesk, Directadmin, SolusVM, VestaCP and many more. I can do what you are asking for.
Please message me to confirm exact cost as it depends on the size and amount of email accounts.