I use Gmail to aggregate all my mailboxes. Gmail's spam folder keeps things for 30 days before deleting them. I've currently got 2965 spam emails in the spam fo

I use Gmail to aggregate all my mailboxes. Gmail's spam folder keeps things for 30 days before deleting them. I've currently got 2965 spam emails in the spam folder - which is a little on the low side of my average. So, I get about 3000 spam emails in 30 days, or about 100 per day. Gmail's spam filtering is almost 100% effective, for me. I see maybe one, occasionally two, spam emails in my inbox per month, and have had maybe 3 false positives over the last couple of years. I very occasionally glance at the contents of the first page of the spam folder, just to be on the safe side, but like I said, I almost never find anything mis-filtered. For me this is good enough - I'm effectively shielded from all spam and don't really notice it as an issue.