Software & Apps MS Office Select All Messages on Outlook.com Easily select every email at once Share Pin Email Print cogal / Getty Images MS Office Outlook Word Excel Powerpoint 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 June 24, 2019 When you want to delete messages in bulk, mark several messages as read, archive a folder of emails, or send a group of messages to the junk folder, select multiple emails or select all the emails in a mailbox folder. To select a group of messages in Outlook on the web, use the Select All option. Instructions in this article apply to Outlook.com and Outlook Online. How to Select All Email Messages at Once To select a group of messages: Go to the folder that contains the emails you want. Heinz Tschabitscher Choose Select All (it's the light grey circle with a checkmark in it above the message list). Heinz Tschabitscher Every email message in the folder is selected and a checkmark appears next to each message. Heinz Tschabitscher To deselect a message, clear the checkmark next to the message that you don't want to include in the group. Heinz Tschabitscher Do what you want to the selected emails, such as delete, archive, move to a different folder, or mark them as read or unread. For even more flexible sorting and selecting, use a dedicated email client. For example, if you use Microsoft Outlook, you can back up your email information for safe keeping.