With the 7.11.8, I can’t check the User may send as themselves. This checkbox is never saved.
To make it works I have to :
Uncheck “users may send as this account identity”
Create users incoming mails and configure smtp
Connect to user account with his login (important)
Go to his profile and associate his smtp account. The admin account destroy this association if I edit it as Administrator. The problem is that email doesn’t have a Sender Name, because the sender same can only be set up by the administrator, it’s the email that is display instead of the name, but I don’t find another solution now.
That’s not the ideal solution but it works for my users now.
Having the same problem myself. Hopefully fundamental issues like this will be addressed in updates prior to SuiteCRM v8 being released as no doubt there will be other issues with the new release.