You may want to click on profile and change your forum name to something other than your email address, just to keep the spammers away.
It really sounds like you need forum software or blog software. I know that my hosting company provides forum software (don't really like it) but you can find free forum software and free blog software on the web. If the forum or blog is busy, moderating can take some time.
If you just want to provide a place for your customers to leave you a message, the CoffeeCup Form Builder can be exactly what you need. The default form when you first open the program is a simple form that is a "contact" form. You can then post the comments yourself using copy and paste to move the customer's text to your web page.