Up until now, the `sent` event type was never processed, probably because it "made no sense", as an unsent email would never trigger an event.
However, it makes sense to process it because you may have a local relay that transmits mails over to the mail provider. In those circumstances, you should have 2 "sent" events (one from the relay and another one from the provider).
Also marked some useless parts of code for removal.
@Tecnativa TT32365
The state will be 'opened' after first time email is opened. Each
successive open triggered warning, because state was already 'opened'
and thus did not match domain state in (sent, delivered).
Forward-port #d9ad3464
- Any model inheriting from mail.thread will have a filter available to
obtain records with errors in their messages trackings.
- The messages can be marked as done to avoid false positives when the
issues are solved.
Jairo Llopis
Uku Lagle
Alexandre Díaz
David
Pedro M. Baeza
Antonio Espinosa
Damien Bouvy