Thanks for your reply Till.
What I did is delete my hostname from my site and now I can't get it back.
I had to add (www) to example.com in the Vhosts_ispconfig.conf to fix my problem
I have an empty host in the co-domains but I am still getting firstname.lastname@example.org
. It was something I did because it used to assign email@example.com
I tried deleteing www.example.com
from the local-host-names but when I create a new email it puts it right back.