setting up an email server

we want to use our qnap as personal email server with spam control using this two = The SpamBouncer free wonderful spam classifier. and SpamAssassin open source version. [login to view URL] this post is more or less what we looking for all pop3 accounts will be downloaded into the Qnap and filtered using spam apps above mentioned and save it all into the local mailbox account(email account) folders , Qnap has its own linux os but PIP python package manager can work on it but have to install it manually .. on Qnap , Xmail and Xdove are available in app center if any helpful Getmail have to be the latest version which supports Auto download all folders ... we would like to use roundcube and rainloop two email client on the Qnap .(not hard to install this two so this two is last to do )