For spam filtering, look at postgrey for greylisting and mailscanner for AV/Spam filtering. Mailscanner takes some time to configure, but is worth it. Whatever you do, make sure you shutoff bayesian ...

Spam sucks. We all know that. There is no better way of putting it -- especially if your company has ever been hit with 10,000 pieces of spam in a single day. It's not too far-fetched a scenario: ...

I have an app I'm responsible for that logs service calls, from emails in multiple exchange mailboxes, that I loop through for access. I'm looking at limiting logging new records from duplicate emails ...