I just got an email from some African banker who wants to rescue some millions from an abandoned bank account. So I checked where it comes from: Gmail.
Gmail, Outlook, Yahoo, the probably biggest sources of spam these days. But the spam from those providers still makes it into millions of inboxes.
On the other hand there is my little mail server, running for years now and never send any spam mail… Way to often filtered out and put into a spam folder for no reason… it's just sad.