Hello,
Do you want to prevent Microsoft Outlook 2013 from marking email as read?
There are a couple reasons to not mark email as read, for example:
- You are skimming your email and want to return to new email later
- You are reading the email from a shared mailbox or other account owner and they have not seen the email yet
To adjust the "automatically mark emails as read" settings, first go to the View tab:
Next, click on Reading Pane and select Options:
Check the box for "mark items as read when viewed in the reading pane" and then pick the number of seconds:
To increase the delay before marking an email as read I suggest 15 seconds.
To effectively disable marking email as read I suggest 999 seconds.
When you are done making the configuration update click OK to save the new settings.