What is the term for a message sent to an email list?

The term that accurately describes a message sent to an email list is a "Post." In the context of email communication, particularly in mailing lists, a post refers to any message or content that is sent out to multiple recipients who have subscribed to the list. This can include discussions, announcements, updates, or any collective information intended for the list members. The use of the term "post" is common in various online communities and forums, and it emphasizes the act of distributing information to a group rather than a one-on-one communication.

While the other terms may convey similar ideas, they do not specifically capture the essence of messages sent to an email list. "Message" is a broader term that can refer to any form of correspondence, "notification" typically implies a specific alert or reminder rather than a general communication, and "broadcast" often refers to a transmission over a wide area, which may not be limited to an email list context specifically. Thus, "Post" is the most suitable term for this particular scenario.