The Variable Email Return Path (VERP) is causing a lot of invoices sent via Netsuite to go to the customer's spam mailbox (I am assuming they are seen as 'spoofing' by the filter) My understanding is that these will not necessarily show up in the email bounce back report run out of Netsuite as this report only identifies those emails which are rejected by the customer's email server (i.e. are identified as 'spam' and undeliverable for this reason) If they are delivered though in a spam folder, there is no way to know other than contacting the customer and/or using the read receipt when sending the invoice. Is this correct? How would you fix this?