Many Sky broadband customers were left without email service yesterday after the company switched off its message systems.
The loss of service affected many people who had not transferred their email accounts to another provider ahead of the company's deadline, the Register reports.
Sky began outsourcing all of its email facilities towards the end of last year, moving one million customers over to Google in November.
There were problems during that switch as well, with thousands of customers being left without email for a fortnight, the Mirror reports.
People using the web to check their email were not affected, but those who used desktop programs to check their email experienced problems because the software often uses different protocols to send and receive messages.
It meant that some customers stopped receiving emails after the switchover.
The company's recent problems also extend to a financial loss for the six months to December 2007. It is the first loss that BSkyB has reported in six years, although a considerable sum was spent last year on upgrading its broadband network infrastructure.