Then it seemed that one day I suddenly started getting 70 to 80 and sometimes 100.

I don't think that the rise in spam is directly linked to the BBS, more that, all of a sudden, spam just became a hell of a lot more prevalent.

It's just that this is the first time that the address I use on the BBS has received any spam.

For catching spam, I use SpamBayes on Outlook. It does a very good job of catching spam.