We are using Mdaemon 9.6.6 and users with Outlook 2003 and 2007. Internally we send and receive mail with no problems. Our mail system is setup mail.x.com same for pop and smtp. When we are on the road we can hit send/recieve and collect mail but when we reply or send a new message it wil either go out into lala land or there is an error. We have Sprint PCS cards and when using those on the road the connections are flawless with sending and receiving. I am not certain why the aircards work and not a HS connection.