My mail system is running since quite a while now. So I was checking the statistics, generated from the log files of the last weeks for getting an overview of the current situation.
Having 8 mails in my inbox means that 20 spam mails have been seen by my mailserver. Of course, those 20 messages didn’t even reach the mailqueue as 12 to 14 were rejected due to blacklists and simple checks. The rest can be handled by a default spamfilter with ease.