I know you have asked this before with no satisfactory answer.
But in your case if it is a issue then:
I would do as I said before setup a email address
[email protected] to use as the sending address.
Setup a auto responder for
[email protected] that explains that the email is not monitored, read the email again or whatever.
Make sure that the contact us goes to a valid email address you do monitor.
Then setup a rule that sends the replies to trash or delete.
Most hosting email accounts will let you do this in some fashion or another.
