We've been using the jethub for a while now and it has worked fine in the past but for the last few days we have an issue where if you select the taskmanager it gives the error prompt "The e-mails with planned tasks cannot be sent. Open SMTP-Settings." (In dutch as we use the dutch version, see screenshot bellow.) We've had this issue before when our database was full but then it was fixed by clearing it. We've also disabled all tasks temporarily and rebooted the services and even the server where JET is running on but with no luck.
I've run through the SMTP settings (see screenshot bellow) multiple times and these seem to be working, I'm even able to send a test mail.
Has anyone else encountered this issue? And if so, how did you fix it? As I said it was working fine until a few days ago.