How do you update 1000 people in your address book easily and for free? Not with Thunderbird! After I cleaned up my address book with Duplicate Contact Manager I tried using Mail Tweak to generate separate emails to everyone in my address book. After about 50 successful sends I got cut off with “Administrative Prohibition.” Whatever. I tried a bunch of mass mail programs and finally found WebSyndication. Free, easy to use, allows for HTML email template usage if you’re into that.