Virgin Media - still getting the hang of email
Anyone pressing 'reply all' on a recent customer service email was sent out, was able to message everyone on the mailing list.
The email was sent to inform the company's customers of new changes to Google services.
Soon many customers inboxes were filled with up to 700 emails, many of them spam or just customers having a bit of banter.
Virgin Media said the problem related to a "sub set" of its virgin.net email customers, but it did not know the precise number affected.
According to the BBC, Bob Alexander, 69, from Taunton, said he had suffered "a great deal of inconvenience and stress" after receiving more than 700 emails.
"I am a quadriplegic and to delete 700 emails from my Blackberry handset has taken me all evening."
Naturally a Virgin Media bot was on hand to trot out the traditional "We apologise for the inconvenience caused."