I have a small office (less than 10 individual users, 20 mailboxes) using exchange 2003 for email, outlook 2003 for email clients and collaboration. Single server (windows server 2003 sp2) that does it all for us. plenty big memory, disk, and cpu wise.
Budget is 0 for software.
Looking for a decent freeware/open source email solution that doesnt just chuck out the detected spam. I would like a recommendation based upon previous experience with any software you've used in the past. Currently we have IMF enabled, but it is not fitting our needs. IMF has problems with our remote users who use webmail exclusively for their email (doesnt filter it until it reaches the desktop, of which remote users do not have an outlook client)
Features needed are:
1. filtering at the protocol level. I.e. mail comes in to port 25 to a running services, processes email, then forwards the results to the exchange server. Exchange server will then throw all reported spam into users' jumk email folder AT THE SERVER LEVEL, not just letting it get through and have the outlook client drop spam into junk email.
2. easy to use interface. doesnt have to be elaborate. just needs to be easy to understand for joe schmoe IT guy.
3. whitelist capable from the end user level. need end users to automatically be able to add their own addresses to a whitelist without IT intervention.
4. free. most important, it should be free or under $50 for all users.
the closest antispam component i've found is XWall, however the $400 price tag is not in the cards.
if I need to run a virtual machine for this, it should be prebuilt and ready out of the box. not going to spin my own linux server and do all the configuration to get another OS up and running.
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