Unread mails auto change

[jipion]

Hi, I use last release with mysql setup and found that if I let Webmail page open, unread messages after random times becomes read one by one even if not opened them.

[marclaporte]

I had noticed some of my emails also becoming read (inexplicably) even if I hadn't viewed them. I use various email clients for testing so I had no idea it could be caused by Cypht.

Let's see what @kambereBr finds out :-)