Not sure how spam is the problem. Mostly solved by good filters. The problem is the amount of legitimate personal emails that one gets, creating the TODO list problem Paul Graham was talking about in his quote at the top of the blog post here.
This is exactly the problem: Some emails you can’t respond because they require taking actions, so they stay in the inbox to remind you. And then it’s the broken window principle... one cool thing I recently found is that on Trello you can have board specific addresses that create a new card when an email is sent to them. This allows me to move the TODO problem outside the inbox.
