Comment 40 for bug 850229

Using ubuntu 16.10 and I am left with the unread emails counter by having a filter which marks incoming mail as read and sends it to trash (using some criteria).
The counter is not reset despite not having any unread email in inbox.
I noticed that it resets sometimes if I receive an email that is not filtered and then read that email. Somehow this triggers something and the unread count works again.