Distribution Group customization

I want to create a rule on the distribution group, where by when the MD sends an email to that DL, users receive the email starting with Dear <MemberName of the DL) e.g. If Jack and Mary are members of a DL Finance, each receives and email start with: Dear Jack and Mary receives the same email starting with Dear Mary. However, the email Jack receives Mary is BCC, same apples for Mary

KimaniBob