But like my 'email canary': http://blog.jgc.org/2011/06/my-email-canary.html
https://grepular.com/Automatically_Encrypting_all_Incoming_E...
They wont be able to read password reset emails or anything else in there.
I might set up a canary though, as it sounds like a useful way of being made aware of a compromise.
I wonder the same thing about my setups. I have a password manager with random passwords for every site/forum that I encounter. It'd be nice to know of the efficacy of this work - has it helped me in any way? I'll never know.
So far no hits..