I usually keep fairly well on top of spam email by unsubscribing to organisations who send it.
All of a sudden in the last week, I'm getting dozens of emails from Boots. 3-4 every day. I've never noticed them being particularly heavy spammers and I last ordered from them c.5 months ago.
I'm a bit scared to click on the unsubscribe link for this one, just because there are so many out of the blue.