Email marketing refers to a network marketing method that delivers valuable information to target users through emails under the premise of the user's prior permission. Email marketing has three basic elements: based on the user's permission, information is delivered via email, and information It is valuable to users. The lack of one of the three elements cannot be called effective email marketing.
According to the above definition, which of the following is effective email marketing?
Xiao Li registered a free mailbox on a portal website, and he indicated that he would be willing to receive information about health care and sports competitions. After using the mailbox, the website often sends his mailbox information including health care and merchandise discounts