I am running freshly installed V-1.1.0 (the zip package was saying v1.1.1).
I am able to create a ticket by sending an email to firstname.lastname@example.org.
If the agent responds, an email is sent to the customer, no issue there.
If the customer replies from Gmail, the email gets converted as a customer reply and gets in the ticket.
But, if the customer is using a mailbox from a different provider (in our case email.cz / seznam.cz) the reply is not converted into a ticket.
Manual call of "php bin/console uvdesk:refresh-mailbox email@example.com" is showing the email was received to the queue and parsed!? (the reply didn't appear in the ticket and even a new ticket is not created).
Do you have any suggestions? If you want, I believe we can reproduce it on your instance of UVDesk (I tried also the demo instance and it has the same behavior).