Hi.

Previously I had the same situation but id disappared suddenly as appeared and I couldn't fix the reason.

Problem is that my incoming emails are marked as read after some time (few minutes). My email clients can't be that reason because I've turned them off for some time. My colleagues that are also on my domain don't have such problem. I didn't do any configuration changes to my account when this problem appeared. 

So what can be the problem?

Regards, Ievgen Babii.