I went through my blocked (spam) e-mail folders this morning. There were actually four msgs that I wanted to read, from three different senders (none commercial). All were legitimately sent to me for one reason or another. I whitelisted two of the senders–not that the 3rd is evil, I just may not have enough time for their mail.
This is unprecedented. Usually I go for weeks without finding a msg improperly blocked. And even then a lot of spam gets through.