As described in the summary, when an email arrives with a return receipt (field Disposition-Notification-To present with a return address), there is no notification in the webmail to accept or not. Does this functionnality lake ? May it be handled by something else than Sogo, like Exim or Dovecot ?
And I notice in my tests that, when SENDING a mail from the webmail with a return receipt to another mail program (I tests with 5 differents clients, web or executables), this field is present in the mail sent, but except for outlook.live, it fires no notification at the arrival... And in outlook, clicking on "send return" seems to never send a confirmation by mail, nothing append. Has this field became obsolete or something like this ??
Thank you for any help