Select Options > Request Receipts > Request a Delivery Receipt. Select Options > Request Receipts > Request a Read Receipt. If the delayed message has already been sent and is in your Outbox folder, open the message in there by double-clicking, then click on the Delay delivery button under Options, then clear the Do not deliver before box as described above, then click Close, and then click Send to send the message on its way. This feature isn't available for accounts, or for IMAP or POP accounts such as Gmail, Yahoo!, or iCloud. Select Tools > Accounts to check your account type. To use this feature, you need a Microsoft 365 work or school account, or an Exchange on-premises account. Supported applications include Outlook for Microsoft 365 and Outlook 2019 for Mac version 15.35 (170610) and later (select Outlook > About Outlook to check your version).
Read receipts and delivery notifications are available in only some versions of Outlook for Mac, and only when using a Microsoft 365 work or school account, or an Exchange Server account managed by your organization. On the Tools tab, make sure the Online/Offline toggle switch is set to ON. If the problem continues, click Help > Contact Support. If an update is found, download and install it. Outlook for Microsoft 365 for Mac Outlook 2021 for Mac Outlook 2019 for Mac Outlook 2016 for Mac More. In Outlook, click Help > Check For Updates.
