Create a segment

Create a segment — a named group of contacts you can target when sending a campaign. Once created, add contacts with Add a member and target it from Create a campaign. A dynamic segment's filter is evaluated live: a condition on a custom field uses the field's default_value for any contact that has no value, and is_set / is_not_set check whether the contact itself has a value. To let recipients opt out of a category of mail instead, see Create a topic. Requires the segments:write capability.