Also, spammers generally don't seem to be going to the effort to apply regex filters to the data they've scraped...
By far the worst one is always going to be something generic like contact@, but my email provider is very good at filtering out those appropriately. :)
But the email I used to interact with the Linux kernel mailing list I had to null route after a while, it got so much spam. I used a throwaway for just that purpose of course, so no big deal.