Hello, I have activated Gmail, Exchange EWS and 2 IMAP addresses.
The delivery confirmation / acknowledgment of receipt does not work correctly for any account, it is actually a read receipt which only works with Exchange EWS. But I would like to know if the message has arrived, not if it has been read.
If I receive a message with read confirmation and open it, the confirmation will be sent without my knowledge! I have no way of saying no. This also affects Exchange EWS accounts.
I have the same accounts in Outlook and everything works correctly there.
(Translated with the support of Google)
Best Regards