> since we're at it, evaluate the opportunity to setup your whole > infrastucture using Virtual Machines (e.g. VMware) such a thing
just as an example; the attached PNG diagram shows a possible setup; there are two VMs running ASSP+SMTP+DNS acting as the frontend MX servers, the two VMs "talk" to a third one running an SQL database storing the ASSP data and an LDAP server used to verify the email addresses; the two ASSP VMs send incoming emails to the backend MTA servers cluster; the outbound email is sent to either ASSP VM and relayed on the internet through the local SMTP Such a config allows to have redundant frontend and backend servers and may be easily expanded by adding more VMs at the needed "point" so it also allows a rather good scalability As you can see, the backend MTAs may be whatever you want; for sure, if you want to setup a cluster you'll need to pick an MTA s/w capable of this; otherwise, if you don't want/need such a feature you may just replace the cluster with a single MTA or setup a VM active/passive cluster with a single, shared storage and config HTH
<<attachment: assp2.png>>
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