I may be overlooking where to find it but I am unable to switch-off automatic 'read' confirmations for incoming messages and I really need it: some companies bombard me with mails to tell me that I delete some daily messages unread. That is an intrusion on my privacy.
There is a 'Send read confirmations without confirmation' in the message view setting (? freely translated so not sure of the English wording) but it is off: I have never been asked to send a read-confirmation or not.
Do I overlook something?