Please consider adding time to the mail list and mail details. Showing 'yesterday' at 09:05 the next morning does not give necessary information to you on when exactly the email was received. Knowing what time the previous day an email arrived is pretty important.

I understand why you may want to save screen real estate on the email list by not showing time (although there's a tonne of space anyway), but when you open an email it should really always show date and time rather than just yesterday.

Thanks.