What Does Piggyback Email Mean?
Piggyback email is an online marketing term that refers to third-party advertisements placed in emails targeted to opt-in email subscriber lists. The targeted subscribers normally belong to the demographic the third party seeks to reach with its advertising.
Techopedia Explains Piggyback Email
A piggyback email with a third-party advertisement is emailed to an opt-in subscriber list from the list owner, rather than the advertiser. However, the advertiser’s email address is displayed to email recipients to facilitate communications.