Using Variable Envelope Return Paths
With the Capture Email Replies feature, email sent from lists, records, and transactions are automatically saved to the contact record and the associated entity's record before being sent to your login email address. This is accomplished by variable envelope return paths, or VERPs.
VERPs route email messages to NetSuite servers so that they can be recorded in NetSuite and then forwarded to the recipient. VERPs don't change or hide sender and recipient addresses. Using VERPs is considered a best practice and complies with the mass email policies of large ISPs and email providers. No setup is required for VERPs.