Actually if you are on Free account, the mail forwarding won't work, because the access to the SMTP server is restricted.
Well jazzy, you may want to check this, I am pretty sure if you add a domain to your freehostia account, you can create an email name@mydomain_addedtofreehostia.com and have emails sent to that adress forwarded in copy to another account. This works just fine for me on the free service too, unless there has been a change lately.
As for OP I am not sure what you are asking:
1. You added your firstname.lastname@example.org
to google, using google as a pop client, meaning just like outlook, google can receive emails from this adress into your inbox there.
2. You added your email here as a second reply adress on google. All this does is use google to send the email through your account there, but attaches the reply adress as email@example.com
, so whoever receives and responds will see that email, rather than your google email. This is in no way related to freehostia or prohibited in any way. Google is the one offering the service and sending the email. This is the equivalent of telling a friend to email you back at firstname.lastname@example.org
rather than email@example.com
3. If you have control of your domains DNS at your registrar you can sign up for Gogle Apps for Your Domain, and have all your email handled by google. http://www.google.com/a/