Simply select any email at once
If you want to delete messages in bulk, mark multiple messages as read, archive the mail folder or send a group of messages to the Junk E-mail folder, select multiple e-mail messages, or view all e-mail messages in a mailbox folder Selecting. Use the Select All option to select a group of messages in Outlook on the web.
The instructions in this article apply to Outlook.com and Outlook Online.
Select all emails at once
To select a message group:
-
Navigate to the folder containing the desired emails.
-
Select Choose them all (it’s a light gray circle with a check mark above the message list).
-
Each email message in the folder is selected and a check mark appears next to each message.
-
To deselect a message, uncheck the box next to the message you don’t want to be included in the group.
-
Do whatever you want with the selected emails, such as delete, archive, move to another folder, or mark them as read or unread.
Use a dedicated email client for even more flexible sorting and selection. For example, if you use Microsoft Outlook, you can back up your email for safekeeping.