Variable Envelope Return Path (VERP)

VERP (Variable Envelope Return Path) refers to a technique used in email delivery, especially in email marketing campaigns and mailing list management. It involves customizing the return address for each sent message so that when receiving responses, bounces, or automatic notifications, it is possible to uniquely identify which message or recipient they correspond to.

This facilitates tracking and response management, as well as the identification of delivery issues or invalid email addresses. The VERP address often includes additional information in the return address so that upon receiving a response, the system can process it in an automated and specific manner.