email setup couldn't finish - couldn't open connection to server
You can open up a command prompt and C:\ ping homecall.co.uk (Please correct me if that is not the correct windows command) to ensure that it isn't a server-fault, and if it isn't, then you'll need to poke around after logging into your account to make sure you have the right protocol (i.e. POP, IMAP, etc) as well as the correct server address, the correct ports, and the correct security settings. 

Typically, it would be something like 
Incoming: 
mail.homecall.co.uk  ; port:143
Outgoing:
mail.homecall.co.uk  ; port:587

But those settings are 99% unlikely to work for you. 
You simply have to find the settings in your email account. 

Typically, you'll find them in your account settings.