Just been evaluating Message Sniffer as an extra tool against the never ending spam attacks. Getting a few false positives, anyone any idea what the status codes mean? For example one from a very large UK tool company got trapped as below (I only weigh at 10 so they are just flagged for now)
Not sure what 60 means? The first mail from the company was greylisted by our server (first email from them for a while) but the resend from their mail server delivered just fine the second time.