Troubleshoot Outlook Not Receiving Emails in Outlook 2019, 2016, 2013 or 2010
First, ensure you're linked to the internet. Once you have got confirmed your connection, ensure you're running online in Outlook.
Look on the lower-right corner of the Outlook window. If it says Disconnected, Working Offline, or Trying to connect, you aren't related in your email server which leads to outlook not receiving emails.
Click the Send/Receive tab at the ribbon.
Click Work Offline in the Preferences organization. You ought to now see Connected to Server inside the decrease-proper nook of the window.
Click the Send/Receive All Folders button inside the Send & Receive group.
Check to peer if the message is now inside the Sent folder or still in the outbox.