Putting together a feature rich email server

I am currently trying to build a ISP level e-mail sever. Apple's mail server won't come close. I am have been trying to research the best software for the job but before I could do that I had to figure out exactly what I needed. Here is the list of features: [list:de1846ffcd] -Accounts and authentication held in a MySQL databes -Multiple Vitrual Domains ( also handled by MySQL databases) -POP/IMAP, as well as "webmail" (squirrelmail) -PHP -Fast and able to handle 1000-100000 users -Secure.. both in program design and ability to use SSL on some of or all Virtual domains -UCE protection/filtering -Antivirus protection [/list:u:de1846ffcd] IS THIS POSSIBLE ON MAC OS X SERVER (XSERVE)???? The goal is to make an easy to administer webserver, hence the need for most looked up data to be in mysql. I am gathering information on how to do this. Instead of reinventing the wheel I am sure that many or all of these requests have been accomplished before. I am turning to the community to figure out the best approach. Any thoughts on this subject is greatly appricated. Apprently ElgertS ([url]https://www.afp548.com/eBBS/search.php?search_author=ElgertS[/url]) has some similar requests. With that in mind I am going to be taking notes and hopefully putting together an article reguarding this process. As of now these are the programs i am looking at... feel free to comment on any of them: [list:de1846ffcd] Postfix as the main MTA [url]http://www.postfix.org[/url] UW Pine/Pico POP/IMAP SquirrelMail [url]http://squirrelmail.org[/url] (with some Plugins) [url]http://squirrelmail.org/plugins.php[/url] PAM-MySQL [url]http://pam-mysql.sourceforge.net/[/url] Postfix Admin [url]http://high5.net/postfixadmin/[/url] WebMin [url]http://www.webmin.com/[/url] MySQL [url]http://www.mysql.org[/url] Mailman [url]http://sourceforge.net/projects/mailman[/url] ClamAV [url]http://clamav.elektrapro.com/[/url] Amavis [url]http://www.amavis.org/[/url] SpamAssassin [url]http://spamassassin.rediris.es/index.html[/url] [/list:u:de1846ffcd] Thanks to all