Hi, I have 8 years of experience as Linux servers Administrator in hosting company in Poland. I'm one of the best Administrators here (only I have so many passed tests here). In my work I installed many mail servers (Postfix, Exim, Zimbra), configured many mail hosting services. Now I'm dealing with maintenance couple of mail servers with 4000-10000 users. Generally mail service, spam problems I know perfect. I will install for you with best practices I know from my long experience: mail server, serious effective antispam, antivirus, panel for managing email accounts. I will test everything after installing. Later I will be support for you, for email I answer up to 2 hours - I have very good contact with client :). I'm serious Administrator with every notes 5.0 so you can count on me.
I can install for you also (in price), webmail and statistics (via webbrowser) to you could see who send most and so on. Later I can even write any individual scripts, raports for your wish :)
My price for installation is 0$ and monthly is 1100HKD, I'm waiting for you, regards.