What can we do about the spam posts?

[YamaWidow]

Hi Everyone
Is there a way to block the users that are posting/emailing spam from Yamaha Lawn Tractor Fan Club??
I am sure I am not the only one that is annoyed by it.
Just wondering ~

[YamahaGenuineParts.com]

Sorry guys but these are never ending....I do my best to block them but a few always seem to slip though.

Speedy
YamahaGenuineParts.com