User-agent:
Mozilla/5.0 (X11; Linux i686; rv:7.0) Gecko/20110828 Thunderbird/7.0
At present, the only use for the mail icon in the panel is to set up
thunderbird (for email anyway). Once an account has been set up, it
would be useful for thunderbird to check emails in the background, and
turn blue when new emails are available. This would mean the user does
not need to keep thunderbird open to check emails and justify the use of
a mail icon in the panel.
It should at least list the accounts that have already been set up,
rather than just showing 'set up mail'.