Use Hotmail, Gmail or the myriad of paid for email facilities.
I already have my own domains with lots of mailboxes for different purposes and I use an ISP just to send and receive emails, also gmail.
I'd certainly not rely on Yahoo or Hotmail.
A fix for the Sky SMTP issue is now here:-
http://helpforum.sky.com/t5/Sky-Yahoo-Mail/Fix-for-s...
It's maybe not Sky's fault but yet another change to email security settings by Yahoo.
Yahoo mail was a constant thorn in the side for BT customers and that is why BT ditched it.
I bet Sky got a cheap deal from Yahoo and now we are suffering.
Edited by deleted (Tue 28-Jan-14 15:41:53)