Since I already have about 4 different e-mail accounts, I like to be able to access them all in one place (namely, Mozilla Thunderbird) rather than trekking all across the Internet just to find my various inboxes. Does anyone know what the correct settings would be to access an @chess.com e-mail in an external mail client? Is it pop or imap for receiving, what is the smtp server address, what ports, tls or ssl?

Sorry if this has been answered before; if it has, I failed to find where it was.

chess.com mail is pop mail.

try this link

http://www.mozilla.org/support/thunderbird/faq#webmail

Actually, it IS POP, but, you need to have at least a Gold membership for POP access. For more information on memberships, please see this page.