If you look on the number of past week’s sent and received mails is approx. 0.13 mail/minute.
And this is less than the number of malicious mails in comparison that number is slightly higher with 0.15 mails/minute.
What I find the most interesting is that most of these mails are rejected directly and only 30 mails are detected as SPAM. I got no false positives so far with this setup and only 2 not detected SPAM-mails in 4 weeks.
You can surely imagine how happy my inbox is right now, the number of received SPAM and even of undetected SPAM decreased dramatically.