Since i have an email account with GMX can i filter incoming email with Comodo if so how do I set it up thanks.
You can use the CASG if you can control the MX records from your domain.
I believe GMX doesnt allow you to do that.
If you have a domain and want a free mail providore, you can try Google App (here you can certainly use CASG).
Google uses Postini for antispam and its usually costs from $13.00 to $45.00 per year per user.
CASG is very effective for much less than that.
If you have questions or you want to setup a free account, send me a PM.
I will be more than glad to help.