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Support XFINITY Internet Configure Mozilla Thunderbird 16.0 and Up for Comcast Email

Introduction

To configure your Mozilla Thunderbird client to work with Comcast email, follow the steps below. To reconfigure your Mozilla Thunderbird client to use SSL instead of port 25, click here.

  1. Open Mozilla Thunderbird.
  2. Click the Tools menu, and select Account Settings.
  3. Click Account Actions in the bottom left, then select Add Mail Account.
  4. Enter your name into the Your name field, your full email address into the Email Address field, and your password into the Password field.
  5. Click Continue.
    The mail account setup screen displays fields for your name, email address and password with buttons for continue and cancel at the bottom of the screen
     
  6. Select POP3 (keep mail on your computer), then click Manual config.
    The mail account setup screen shows pop three selected along with buttons for get a new account and manual configuration
     
  7. In the Server hostname field (next to Incoming), enter mail.comcast.net. Confirm the Outgoing (SMTP) server hostname field contains smtp.comcast.net.
  8. In the SSL column for both Incoming and Outgoing, select SSL/TLS. This will automatically change both the port numbers and authentication methods. Once changed, the new ports should automatically read 995 for Incoming and 465 for Outgoing. Authentication method should be Autodetect for both Incoming and Outgoing.A screen shows that the ports have been changed to 995 and 465
     
  9. Click Re-test.
  10. Click Create Account.
  11. Click OK.
Congratulations! You're done configuring your Mozilla Thunderbird client to send and receive Comcast Email.

To Reconfigure Mozilla Thunderbird Client to Use SSL Instead of Port 25

  1. Open Mozilla Thunderbird.
  2. Click the Tools menu, and select Account Settings.
  3. Click the Server Settings section under your Comcast.net account on the left.
  4. Enter 995 into the Port field. Select SSL/TLS from the Connection Security drop-down menu.
    The server settings screen displays that 995 has been selected as the port and SSL/TLS has been selected from the connection security menu
     
  5. Click the Outgoing Server (SMTP) section on the left.
    The outgoing sever settings page is displayed
     
  6. Click Edit on the right.
  7. In the Port field, enter 465. In the Connection Security drop-down menu, select SSL/TLS. In the Authentication Method drop-down menu, select Normal password.
    Normal password has been selected as the authentication method on the smtp screen
  8. Click OK.
  9. Click OK again.
Congratulations! You're done reconfiguring your Mozilla Thunderbird client to send and receive Comcast Email over port 465.

As an additional step, third party email clients are often configured to delete messages from the server. This will prevent additional devices from receiving your Comcast email. To use your Comcast email account on multiple devices, you will need to ensure that email messages are not deleted. To configure your Mozilla Thunderbird client to not delete messages from the server:
  1. Click the Tools menu, and select Account Settings.
  2. Click the Server Settings section under your Comcast.net account on the left.
  3. Check the box next to Leave messages on server.
  4. Click OK.

Find this article at:

http://customer.comcast.com/help-and-support/internet/setting-up-thunderbird/