Question : Bad request invalid hostname - IIS GFI Mail Essentials

So I have GFI Mail essentials for anti-spam and using the quarantine option.  WHen a user gets a qtine report inside the LAN the URL (as specified in GFI Config) goes to
 http://abc-server:80/SpamQuarantine/approve.aspx?id=53b6fb40-eb31........etc...
And it pulls up just fine  with a message that it was approved and the spam will go through.

Obviously this wont work on the outside as abc-server is not my domain name.  So I tried putting mail.abc-server.com which is the owa address keeping the /SpamQuarantine and from the outside now I get the "Bad Request Invalid hostname" message.  I have alsotried the public IP of the mail.abc-server.com/SpamQuarantine with the same result.  Restarted IIS and all the GFI ME services multiple times after changes with same results.  Their support is lacking tremendously...
I saw something that said disable http redirects which I am not sure how to do, but there was another IIS www running called http redirects, and I did click stop but that didnt change anything.
Thanks for the help

Answer : Bad request invalid hostname - IIS GFI Mail Essentials

so, is "default web site" listening on "all unassigned" ip addresses and on port 80?

in your router, is the ip address for mail.abc-server.com forwarded to the same box GFI's webserver is on?

does the gfi site do any other redirecting after internal clients connect to it?