Problem with notification on tracking

[andrea.soc]

Hi
i have the egw 16.9.002 ce and i have a problem with tracking notification stop working.
For reconfigure :

1. enter with my user name (admin group)
2. click on mail app
3. Skip imap configuration
4. insert the data input for an account used for only notification
5. use smtp with starttls port 587
6. select this email configuration for every user
7. save

but when create a new ticket the email don’t arrived.
thanks for support