Is this a seasonal thing? About a month ago, my daily email spams went from ~20 up to ~200.

Mind you, most of this is caught by various spam filters - some at the system level, and others at the client level, but still...

One I see happening more are 'bounce' spams -- that is, spam messages that are sent to one system with a forged 'from' email address, which is then caught by their spam filters, then 'bounced' to the address in the 'from' field.

System/email admins, please update your configurations -- If you have system-level spam filtering (and you should), set it up to reject spam messages at connect time. There are plenty of sites out there that will walk you through setting it up for your system.