Github "confirmatory 2fa" is an example. If I could, I'd turn it off, but there's no option for that (There's only an option to turn it "fully" on. hah!).
I had been redirecting github emails to my preferred folders, but then when the 2fa email came up, I had to spend 5 minutes tracking it down, because only the inbox sends notifications on my phone. So I reluctantly removed the rules, and now it litters my inbox by design.
I hate 2fa with a passion.