[EdNutting]

My 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.

[EdNutting]

N.B. Using service-specific emails is trivial - you don't need separate email accounts. Just use email aliases, e.g. "[e-mail]" -- which is an alias called "github" for "[e-mail]"

[input_sh]

A simple regex filter will get rid of that. Now, if you use your own domain and have it configured as a catch-all, then you could do [e-mail].

[gus_massa]

Don't spammers have an automatic filter to cleanup that?