Yahoo provides Sky customers with email services. And, as you've no doubt heard, Yahoo has just officially confirmed that it was massively hacked back in 2014 - exposing some half a billion customer records.
Where does that leave Sky email customers? Sadly in the same boat as Yahoo customers.
Here is what Sky is telling its customers:
At Sky, we take the security of our customers’ data and information extremely seriously.
You may have seen that overnight Yahoo! announced that a copy of certain user account information was stolen from its company’s network in late 2014. Yahoo! is the provider of sky.com email accounts.
If you are a sky.com email holder, in line with the advice provided by Yahoo!, we advise that you change your passwords online and follow good password management practices.
Good password practices means ensuring that you're not reusing the same password anywhere else online, making sure that your passwords are strong, hard to crack and impossible to guess.
My advice? Get yourself a decent password manager and - where possible - enable two-step verification to further defend your online accounts.
Of course it's worth remembering that it's not currently thought that the passwords of those 500 million Yahoo users have been stolen. But other credentials have been (email addresses, phone numbers, dates of birth, and sensitive security questions and answers).
And that's still enough information for online criminals to cause a mischief and potentially break into accounts.
You can read more advice in my article on the Yahoo breach.
A similar warning has been issued for users of BT Yahoo Mail.