Our company has gotten new email addresses from a new email provider. In Outlook it is fairly easy to set up. Everything is 'found' automatically. On my Mac however, I have to setup an Exchange account in Mac Mail by hand. The problem is, the account won't connect to the mail server which is found through a internal ip address. When I ping that address through Terminal it works, so that ip address is ok. When I setup the mail account however it says 'The Exchange Server at '172.**.**.**' won't respond'. User and Pass are ok cause I can view my mail through the webmail account. Why can I Ping that 172 ip address, but Mail won't connect to it? Is there something the IT department should do extra to make it work?