Abstract: An ungrouped list associated with a communication artifact can be identified. The information can be associated with a recipient, which can be a user registered within a computing system. Group data information associated with an external source can be received. The source can be a data source not associated with the artifact. The group data can include a group and/or a contact identifier. Recipient information from the recipient list can be associated with a group identifier if the recipient identifier is equivalent to the contact identifier within the group data. A grouped list can be generated from the associated data. A grouped list can be presented within an interface. The presenting can present recipient information within a logical grouping for at least a portion of the recipients of the ungrouped list. The grouping can be an organization of recipient information associated with the group identifier.