Delete a request from the list

Some idiots find it funny to use my mail address from the imprint on my webpage, so now I have a list of “my own” requests.

Is there a way to delete them out of the list of requests to keep the list clean with only REAL requests.

Maybe a Blacklist for request mail adresses that we can define would also be very helpful and keep things cleaner (admin@domain.com, imprint@domain.com, etc)