For the purposes of the Computer Misuse Act 1990 s.17(8)(b) the owner of a computer able to receive emails would ordinarily be taken to have consented to the sending of emails to his computer. However, such implied consent was not without limits, and the consent did not cover emails that had been sent not for the purpose of communication with the owner but to interrupt his computer system.

[2006] EWHC 1203 (Admin)