Alternate port is messed up

I'm running SD+ 5500 with on an alternate port since my port 80 is taken. I have a web forwarder from support.mydomain.com that resolves to mail.mydomain.com:8888. Is seems to be working fine. My issue is that if a "new" user emails the helpdesk they will receive a message "Your self-service login details for HelpDesk application" at the bottom there is a link to "The application can be connected at http://support.mydomain.com" when the user clicks on it an error "HTTP Status 404 - / http://support.mydomain.com". After doing a little digging I see that the link is actually "http://mail.mydomain.com:8888/http://support.mydoamin.com".

Is there away of flushing the first half?

Thanks,