Another solution is detailed here, but I cannot testify to how well or bad it works. For spam filtering, look at postgrey for greylisting and mailscanner for AV/Spam filtering. Mailscanner takes some ...

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 ...