email addrsss not showing from Advanced guestbook

I get people signing my guestbook but when i get an email telling me this, the email addresses seem to default to @yahoo.com.
For example if someones address was joebloggs54@yahoo.com
I just see it as joe@yahoo.com in my email inbox.
There seems to be an error where the script strips the numbers from the email address.

Can anyone tell me how to fix this?

Thanks

Emma

Does it also strip the numbers from the emails as they appear in the guestbook?

Hi and thanks
No it dosent strip the address out on the Guestbook web page, just in the email i get in my Yahoo inbox

Emma

I still havent had any luck sorting this out (see original problem i posted)
Can anyone help please???
I had another email today which just showed diana@yahoo.com

Thanks

Emma

Hmm wonder if it's not a Yahoo problem. Check the headers to see what it says in them.