I don't really know, but I do hope to get a lot of email at georgespamungus@gmail.com.
I can't think of any that are well known, but it's certainly a common bug (I put one into production a few months ago). Surprisingly it's a bug with few major ramifications. If you're using an email provider like Mailchimp you'll often pass your email quota, often be rate limited and depending on the vendor you may even get a call. Even if that doesn't happen, email already has a defense for this: spam filters.