antispam, antivirus, administrator filter and user filter in only one qmail (only one server)

[José Luis Solano]

Hi all, I installed a qmail-ldap in April, and now I have a new project. Current project needs the following architecture:              e-mails I/O                  |                  |=20 -----------------------------------------              antivirus                   |              antispam                   |           administrator filter                   |              user filter ------------------------------------------                   |                   |            mailboxes   So, when an email arrives to my systems the first step is the antivirus, second antispam, third  administrator filters (rules written by the system administrator to filter mails) and the last one is the user filter (rules written by the user, owner account to filter his mail)   My questions is: is it possible to have only one qmail server in only one machine with the four steps: antivirus, antispam, administrator filter and user filter?   My first idea was to have four qmail servers in the same machine using different ports, but this solution is not correct for my project. So anybody has any idea to help me??   Thanks in advance     Jos� Luis Solano