Hello list.
Is it possible to use spamassassin before it reaches the server??
We would like to implement it on a firewall system which is set in front of our servers. Would this be possible? Has anyone done that yet? What is needed?
No, this is fundamentaly impossible. A firewall can modify packets (ie: the cisco PIX) to modify the behavior of a SMTP session, however it would be impossible (or absurdly difficult at the very least) for a firewall to be sufficiently stateful to buffer an entire email and handle the entire transaction.
Even if you were to do that, your firewall would now effectively be a full-blown mailserver of it's own, that runs SA and then passes inbound email to an internal mailserver. And let's face it.. at that point you may as well do a two-mailserver setup.
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