CASL is Canada's new anti-spam law. It comes into effect on July 1, 2014. Email under CASL is considered commercial electronic messages or CEMs. These are email messages that promote, or could reasonably be expected to promote, a commercial activity. This includes email messages that offer to sell a product or service, advertise or promote a person's business or professional activities, or solicit a donation. CASL requires that all CEMs include certain information in order to be considered valid, including the sender's name and contact information, and a way for the recipient to unsubscribe from future messages. Additionally, CEMs must obtain explicit consent from recipients before they can be sent.