BT has been fined £77,000 by the Information Commissioner's Office, after it sent nearly five million nuisance emails to customers.
The investigation found that the telecoms company did not have customers' consent for such direct marketing.
The 4.9 million emails, sent between December 2015 and November 2015, promoted three charities.
BT said it was "disappointed" by the ICO's decision to impose a fine.
https://www.bbc.co.uk/news/technology-44546626