Office 365 - Outlook - Not Receiving or Sending Emails

Have you not received any emails in a while or are your emails not loading in or you are having trouble sending emails out? Here are some troubleshooting tips for Outlook when it comes to receiving and sending emails.

Check out the troubleshooting suggestions below for your option of Outlook:

Outlook (for the Web)

*Note: Outlook is accessed via a web browser, like Google Chrome, Firefox, Safari, etc.. 



Outlook (Desktop Client/Application) 

*Note: These are troubleshooting tips for both the Mac and PC/Windows versions of the Outlook desktop client/application. 


  • Close out of the desktop app completely and re-open it in order to sign back in. 
  • Sign out of your email account and sign back in again to re-authenticate.  
  • Click on the "Send & Receive" button under the "Home" tab for the Mac version and click on "Update Folder" under the "Send/Receive" tab for the PC/Windows version. 
  • Check to make sure that you are not "Working Offline."
    • PC/Windows Working Offline:  The "Work Offline" option is under the tab "Send/Receive." 
    • Mac Working Offline: Select "Outlook" up on the top left next to "File" and make sure that "Work Offline" is not checked. 
  • Check the connectivity to your email server (from Microsoft Support) 
    • Check that your device is connected to the internet: To send or receive email, you'll need internet access. Make sure your device is connected to the internet.
    • Try sending email via the web: Many email providers let you access your email via a website. Sign in to your email account via the website and confirm that you can send and receive email there. If you can't, there might be an issue with your email server. Contact your email provider for support.
    • Try sending email from another app or device: If you have another email app or another computer or mobile device, try sending and receiving email from that app or device. If you can't, there might be an issue with your email server. Contact your email provider for support.
    • Check with your email provider about the status of your email server: If your email provider doesn't have a website and you can't set up your email on another app or device, contact your email provider to see if your email server is accessible.
  • Other Outlook for Mac troubleshooting tips
  • Check your inbox and sweep rules within your settings. 
  • Check your recycle bin or deleted inbox.
  • Check your spam, junk and/or other possible inboxes/folders. 
  • Search for the emails that you may be missing with the search bar to see if they are ending up in a different folder.
  • Check to see if you are blocking email addresses within your settings
  • Remove and re-add the email account within the Outlook client.  
  • Check for any pending updates for your computer/device, especially for Office 365 or Outlook. 
  • Restart your computer/device.  

Outlook (Smartphone/Tablet Application) 

*Note: These are troubleshooting tips for both iOS and Android versions of Outlook. 


  • Close out of the Outlook app completely and then re-open it. 
  • Sign out of the email account and then sign back in again to re-authenticate with Duo.  
  • Check your Internet connection, which may include checking your WiFi connection and/or your cellphone's network provider. 
  • Check your recycle bin or deleted inbox.
  • Check your spam, junk and/or other possible inboxes/folders.
  • Search for the emails that you may be missing with the search option to see if they are ending up in a different folder.
  • Remove and re-add the email account on the Outlook app. 
  • Check for any pending updates for your device or for the Outlook app. 
  • Remove the Outlook app from your phone and re-download it from your phone's app store to make sure that you have the most updated Outlook app.
  • Restart your smartphone/device. 


*Need more help with Outlook? Then check out the Microsoft Support website for Outlook help & learning.

See Also:




Keywords:office, 365, outlook, emails, none, not connected, web, client, application, send   Doc ID:99600
Owner:Erin B.Group:UW-La Crosse
Created:2020-03-26 13:26 CDTUpdated:2021-02-26 09:23 CDT
Sites:UW-La Crosse
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