What Does Unsolicited Commercial Email (UCE) Mean?
Unsolicited commercial email (UCE) is an unwanted and unsolicited email sent for commercial gain. In addition to being unwanted, UCE is sent in huge quantitites, either to email addresses harvested from the Internet, or to random addresses at major email providers.
Also known as email spam.
Techopedia Explains Unsolicited Commercial Email (UCE)
Spamming is considered a direct violation of Acceptable Use Policies by most, if not all, ISPs. Most developed countries also have laws in place making UCE illegal. Technically speaking, spam refers to any bulk sending of messages on an electronic system, but most consider the term "spam" synonymous with "email spam."
UCE is basically the same as UBE (Unsolicited Bulk Email). The term UCE is used by the Federal Trade Commission in its enforcement and regulation in the United States.