Ok mydomain wasn't even in the main.cf file. I had myhostname though and it was www.ptsgroup.ca
If I understand correcly i have to change them to something else than ptsgroup.ca (i used www.ptsweb.ca
, which is in my hosts file).
I tried changing a couple of things around but still all mail is delivered to the catch-all of ptsgroup.ca (which is our main domain)