I conduct a community band and the membership is always changing, but I have their e-mail addresses in a separate address book within Thunderbird. I know I can simply edit an existing email filter by adding in each new or changing email address but that is cumbersome and results in a particular filter having up to 70 different conditions to meet. Is there a way to simply edit an email filter such that it effectively says "if an email address is in xyz address book move the message to xyz folder?" Thank you for any guidance you can offer me on this point. David H. Bailey