Currently in IBM SmartCloud, whenever the external sender keeps group address and individual member address in To or CC field then 2 copies are delivered since sending client can submit different copies for different recipients as client is not aware that, this recipient is member of group. In that case, 2 copies will be delivered to recipient. Since mail copies can be split over SMTP, so there are high chances of getting duplicate mails by recipient. So there is an Enhancement Request for omitting the one copy of such duplicate message and deliver only 1 copy to recipient. Currently this feature works correctly only in internal mails to consistently remove duplicate copies. Same is requested for external SMTP mails in this Enhancement Request.