This article works with the latest version of Thunderbird (115.3.2).

If you have not done so, download and install Thunderbird. 

• Make sure that IMAP is enabled for your UMD email account.
  
  
• Open Thunderbird
  
  
  • Windows
    
    If you do not see the menu bar press the alt key to view the menu bar.
    
    
    
    
  • Mac:  The menu bar should automatically appear.
    
    
  From the menu, navigate to File - > New -> Existing Mail Account.
  

1. Enter your name and email address, then click Configure manually.  Do not enter a password.
   
   
2. Enter the following values:
   
   
   • Incoming Server
     
     Server hostname is imap.gmail.com
     Port number is 993
     Connection security is SSL/TLS
     Authentication method is OAuth2
     
     
   • Outgoing Server
     
     Server hostname is smtp.gmail.com
     Port is 465
     Connection security is SSL/TLS
     Authentication method is OAuth2
     
     
   • Click Done.

   

   
   
3. You will be prompted to sign in with your UMD Google Account. Enter your Directory ID. Click Next.  If @umd.edu is not present, then enter your directoryid@umd.edu.
   
   
   
   
4. Log in using the Central Authentication Service (CAS) and Duo using your Directory ID and password.Duo.
   
   
5. Click Allow to give Mozilla Thunderbird email access to your Google account.
   
   
6. Click Finish to start using Thunderbird.