Email scam is an unsolicited email that claims the prospect of a bargain or something for nothing.
We also have a large team of experts dedicated to the removal and closure of fake scammer banks and sites.
Many individuals have lost their life savings due to this type of fraud.
Can you exclude any possibility that some "normal" non-spam mail would come from Russia? Maybe according to your mail servers you can assume this, but overall only 4.9% of total spam comes from Russia according to Trustwave.
If yes, you may ignore and filter away the totality of the mail traffic from there. According to Securelist the number is as low as 1.7% for January 2012.
See this picture for how far down Russia is placed on the spam list: Edit: additional info.