automatically redirect a folder to an email account

[DavidWZ]

Hi there,

I just started to use mailredirect addon, it's very nice. and maybe this topic has already been covered, but... how do I automatically (like setting up a filter) redirect a folder of emails to, say a gmail account? I've set up thunderbird to retrieve my yahoo and hotmail emails using webmail addon, now I'd like to set an automatic redirect of these messages to my gmail account (doesn't have to use imap, I can just use smtp to send emails).
Can this be done?
thanks a lot!

David