Customers keeping their Be Broadband service following the Sky takeover will require a new email address from spring 2014, it has been revealed.
Sky says that customers who join from Be - or remain on that service - will no longer be able to use their existing inbox from early next year.
Customers who join Sky from O2 will be able to keep their address "for the time being", alongside a new Sky email. However, they will see their O2 inbox storage limited to 20MB.
"If your O2 inbox exceeds this, you will need to remove some emails and stay under this limit to continue to receive emails," Sky explained.
The broadband provider said that both Be and O2 customers will receive a letter from Sky nearer the time of the email changeover.
This will contain information explaining how users can keep hold of important emails should their old accounts be shut down, Sky said.
"Once you've moved over to Sky and set up your My Sky account - if you don't already have one as a result of being a Sky TV customer - you will get set up with your new and unlimited Sky email account," the firm added.
"Simply visit sky.com/mysky/makethemost/sky-email and your new email account will be generated."