three things you can do - rather than complaining.

1) Mark email as spam
2) Move it to Junk folder or
3) Delete the message.

If you still get those message- Mark the user as abuse or write an email to your domain admin to block all email from that user.

Please stop complaining to these silly things - in a forum like this magnitude.

You're always free to contact me if you need any help : my email is nanda_od(at)in.com

Hope this helps!