Strange Emails

We have been getting a lot (like 20 at a time) of emails with xxxxx@myWebsite.com where xxxx is always different names or random combination of letter and my Website is my web site's name. Does anyone know why this is happening and the affects on our web site?
Thanks,
James

 

Let me be a little more clear on the problem:
The email I get at my email address (MyName@MyDomain.com) is generated from someone filling out our "Information Request" web page. For all the fields, xxxx@mydomain.com is entered.
Example:
City: xxxx@mydomain.com
State: xxxx@mydomain.com
Title: xxxx@mydomain.com
Name: xxxx@mydomain.com Comments: xxxx@mydomain.com

All the above fake email address are the same. A random name is used with my domain at the end. We would get a bunch at a time each one using a different name or set of random letters. Any ideas?
Thanks again

 

jamepc--If your website is inviting people to send you emails, perhaps someone, with nothing better to do, is taking you up on the offer and sending you junk.
If you want to try to trace who is doing the sending
http://email.about.com/cs/spamgeneral/a/spam_headers.htm

 

Thanks for the reply.
It's an HTML form that's filled out by the person and then their info is automatically sent to us. They don't directly email us.
It must be some sort of bot or something. Way to many emails for someone to be filling out 20 fields in each of the 40 or so emails we got so far.
I guess some people don't have anything better to do, huh?

 

jamepc--Can you ask someone who is running the website hosting your webpage and that form? If you are paying them, I would hope they offer assisitance.