 In January 2007, Tumbleweed's MailGate 5550 was named "SC Magazine"’s Best of 2006 "Recommended" award in the Anti-Spam category.Tumbleweed has a patent portfolio including 22 utility patents and one issued US design patent.US patent 6192407 is one of several owned by Tumbleweed that relates to document delivery systems that generate a unique URL for intended recipients of a document in order to deliver that document.