Global Internet's Mail Servers are configured to reject mails
if the From Email Address doesn't match the Domain name that is hosted
with us. To send mails in this manner, you need to make sure that you have added
a hidden field with the Name, Email and value as that of your From Email
Address, i.e. any@yourdomain.com to your form.
An example is given
below:
<input
type=hidden name=email value="any@yourdomain.com">
Note that, if you are
using some custom made PHP or any other CGI script then you need to specify the
From address. You will have to check the manuals of the programming language
that you use to understand how to achieve this.