All of a sudden, my new emails don't appear in bold. I open my account and it looks like they've already been read. 

This morning I opened and there were a few emails that were bold and as I was watching they turned to plain as if they had been opened and read. 

The only change I've made is, since upgrading to Windows 10 I switched from POP to IMAP, but I did that right away and thigs were fine until recently. 

All of a sudden, my new emails don't appear in bold. I open my account and it looks like they've already been read. 

This morning I opened and there were a few emails that were bold and as I was watching they turned to plain as if they had been opened and read. 

The only change I've made is, since upgrading to Windows 10 I switched from POP to IMAP, but I did that right away and thigs were fine until recently.