Sure, this could be a critical customer requirement. Use case: A client has signed up for a service and is paying to receive a report. In this case, they rec

Sure, this could be a critical customer requirement. Use case: A client has signed up for a service and is paying to receive a report. In this case, they receive a link to download. No tracking embedded in emails. Verification: 2 review cases. Monthly review. Case 1: Email bounces from server. Case 2: Email doesn't bounce but not checking report. In both cases, sales/customer service get in contact with the customer. For Case 1, to check an appropriate email address (client contact leaving, mailbox full/disused, etc). For Case 2, largely to check if reporting can be more useful (i.e. actually look at the report) which can result in interesting ideas about better integrating into their workflow/needs, though spam-whitelisting is also sometimes a factor here. I tried the links you provided with an email address on my personal domain that I know not to be deliverable, and it was reported as deliverable.