Email, Messaging, & Video Calls Email How to Mark a Message Unread in Yahoo! Mail Mark emails read or unread by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on September 30, 2019 Thought Catalog / Unsplash Email Yahoo! Mail Gmail Tweet Share Email You can easily mark emails as read manually in Yahoo! Mail. However, if you read an email message in your inbox but it still shows as unread, change a setting. Learn how to mark messages as read or unread manually and find the settings to make changes automatically. Why Won't Yahoo Mark as Unread? If you read email messages but they still appear as unread, changing a setting might be the quick and simple solution. Log in to your Yahoo! Mail account. Select Settings (the gear icon). Select More Settings. Select Viewing Email. Select an option in the Mark as read interval section. The options are: ImmediatelyAfter 2 secondsAfter 5 secondsNever If you select Never, emails remain marked as unread even after you have read them. Return to the inbox. How to Mark a Message Unread in Yahoo! Mail If a message is marked as read but you want it to appear as unread, change it manually. There are two ways to do so. Right-click the email message you want to mark unread and select Mark as Unread. Select the check box next to the message, select More, then select Mark as Unread. To mark multiple email message as unread, select the Select Message drop-down arrow, choose All, then mark the email messages as unread. Alternatively, use either method to mark an unread message as read.