I suspect this is a MUCH larger problem than people realize and not Dropbox's fault. I've noticed in the past few months I've been getting spam to a lot of site specific emails I've used under my Gmail catch all. It's as if a spammer had access to all email addresses I've used for incoming mail. I've talked with friends and found some have had the same problem. So where are spammers getting the email addresses we've…
4. You're leaking your own email addresses.
Start by looking for malware on every device you touch.