office 365 home premium for mac online version

I have a problem I have recently got office 365 home premium online I have installed it and have gone into outlook to add a email account it is the email address that is used on my web site so it is an account that outlook will configure automatically the problem i am having is to start with iI could receive emails but not send them had a play arround not knowing what i am doing im a chef not an IT wis but anyway the out come is i now cant receive or send emails and i keep getting message come up saying outlook cannot connect to the server. verify that your computer is connected to the network. well im connected to the network well I must be im able to type this question pleeeeeeeeeeeeease heeeeeeeeeeeeelp