Thunderbird can be used as a client for a Comcast email account. Thunderbird will download messages from the Comcast server and store them on your local system. Similarly, Thunderbird can be used to compose messages which are sent through Comcast's mail servers.
This page describes Comcast-specific settings. For general information, see these topics:
Comcast has several conflicting and sporadically functional recommended configurations. The settings shown below have worked for Thunderbird users. See the Comcast section on MozillaZine's Creating accounts in Thunderbird for popular email providers for a description of the issues with various Comcast account settings. Also, refer to Comcast's email help pages.
To send email via Comcast, check that your Outgoing Server (SMTP) is configured as shown below. (To access your outgoing server settings, clickand then select Outgoing Server (SMTP) from the bottom of the list on the left.)
To receive email via Comcast, check that your account settings are configured as shown below. (To access your incoming server settings, clickand then select Server Settings under your account name from the list on the left.)