Thunderbird and Postfix

[Jonas Mazakolo]

Hello,

I find thunderbird to be my favorite email program, but unfortunately I 
have already set up good spam filters through 
postfix/procmail/fetchmail and I wish to keep that. I read that some 
have set up IMAP servers so thunderbird can access it. Is that 
possible? How can I set up a very simple IMAP (which ones? dovecot? 
cyrus? courier?) server? Could someone help or point me to documents 
that tells me how to set it up (a standalone IMAP server with no 
connection to outside internet, just on my box?

Thank you,

Jonas