Referred by email automatically added

i was hoping that a feature to have the "referred by" email automatically added to your contact email and especially a group email (this would limit to 50 contacts at a time). this would save me a lot of time and money as i would not need a dedicated person to send these out as i do now. Currently if i send a follow up email to a "lead in" or "prospect" for example, i must do it one at a time to include the referring broker as they like to see the email to their client as it becomes a reminder to them to contact their client and follow up. they have all mentioned this to me and feel this is a great service i do and it help me get more business.