You now have a choose in using your company's server or LiveHive 's server in sending out emails. Under your login name to the right corner, click on the Settings in the drop down. Then select Email Server (this Tab will appear after your Admin has changed the proper settings in the Admin page).
Then you will select Company Server and enter your credentials for your email, select Authenticate then Save.
This will allow you to use your company server. You may change back to LiveHive's server at anytime.