Purrley,
Here's what I posted in the Dog General section. All you have to do is click on the option to read the messages on the board, rather than through the email. I think it must default to email when you first join up.

When you are signed in on the group page, click on "Edit my membership". Then you can scroll down and choose the way you want to receive messages. I too, hate getting the message responses in my email.
Hope this helps!