my goal is to have a mail server with antispam, antivirus sitting between the isp/isp_mailserver and the local network.
1.all the users will have mail boxes on the local mail server.
2.users’ mail clients will interact with the local mail server.
3.local mail server will interact with user mail boxes on isp hosted mail server.
4.local mail server has active antispam filters and anti virus functionality.
5.user can configure their mail boxes, filters, spam filters on local mail server through web interface
I have lot of questions. I am really confused on which component to use and where like fetchmail, sendmail. postfix, squirrelmail, cyrus imap server…
Can some one point me what to use and where? thanks in advance.