alt Hacker NewsMy solution to this is to use a Github-specific email address. All emails sent to that address which do not originate from GitHub are immediately reported as spam, marked read and deleted.
I sometimes use different git/GitHub addresses depending on who I'm working for or specific projects so I can more accurately detect where data is being scraped from.
N.B. Using service-specific emails is trivial - you don't need separate email accounts. Just use email aliases, e.g. "[email protected]" -- which is an alias called "github" for "[email protected]"