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Set up Office 365 Mail for Thunderbird Mail Client

The following instructions detail general setting changes that can be made within Thunderbird in order to ensure that the user can send and receive mail. 

Sending Mail

  1. Go to Tools > Account Settings.
  2. In the Account Settings window that appears, select "Outgoing Server (SMTP)" in the bottom left hand corner.
    NOTE: You may have more than one SMTP server listed if you have set up Yahoo or Gmail as well. 
  3. In the SMTP Server window that appears, fill in the settings below as follows:
    1. Server Name:
    2. Port: 587
    3. Connection security: STARTTLS
    4. Authentication method: Normal password
    5. User Name: your personal Cal Poly email address (i.e.
      Thunderbird SMTP Server Settings
  4. Click "OK."

These settings should allow you to send mail from your Cal Poly address, on-campus or elsewhere.

Receiving Mail

  1. Go to Tools > Account Settings
  2. Select Server Settings
  3. In the Server Settings window, fill in the settings below as follows:
    1. Server Name: 
    2. Port: 993
    3. User Name: Your personal Cal Poly email address
    4. Connection security: SSL/TLS
    5. Authentication method: Normal password
      Thunderbird Office 365 Server Settings
  4. Click "OK."

The settings should allow you to receive mail in your Thunderbird mail client from your Cal Poly address. 


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