Enable read receipts for all messages is that some how possible to do that?
It is when invoices and reminders are sent.
Also delivery receipts?
It is like when you send an email from outlook and then you “Request a Read Receipt” under options.
This type of functionality is not reliable unless using a transactional email service such as Postmark, where they are able to provide “open/read” reporting.
via SMTP, this is not something we would look at attempting to implement.