Hello.
I set up a email box to send and receive emails. It works fine.
The issue is that new ticket created from incoming email is not shown in the ticket list.
In the email box I see that email has been fetched. On dashboard I see increased tickets number of my department. 
I have admin privileges.
osTicket Version	v1.11 (d4e240b)
Web Server Software	Apache/2.4.29 (Ubuntu)
MySQL Version	5.7.25
PHP Version	7.2.10-0ubuntu0.18.04.1