We currently have an ASSP machine which does all our spam filtering. This has worked perfectly for the last 2 years however sometimes it becomes slow and connections time out. After giving this some thought and for added features, we thought about adding a server upstream of ASSP. This server accepts all the emails, then passes them to the ASSP for filtering.
IE mail does the following. INTERNET > EMAIL PROXY > ASSP > EMAIL SERVER
By doing it this way we have a backup of the email before it was filtered. I can achieve this with a mailenable server set to accept all mail and relay it to the ASSP. The issue with this test setup is that the Assp server sees the headers of the mailenable server and the RIBL URIBL checks don't work as the origination IP is the mailenable server not the senders server.
Is there any program out there which can accept the email and take a copy before relaying/passing to our ASSP server.