I have always reccomended not using broadband isp based email services, but the fact isp's such as sky now only piggyback on 3rd party services that are actually normally free makes it even worse.
Just buy a domain and have a permanant email address on that or if you consider that too expensive sign up for a free gmail account and then you dont have worries about sky shifting platforms again (to me thats stupid) and as well if you change isp in future no worries on losing email address.
BT Infinity 2 Since Dec 2012