If it is opening seemingly on its own, I am going to guess that something else is trying to open it. Like a calendar trying to send alerts or something like that. Maybe even a ToDo in Mail? Do you have any of that going on? On Thu, Nov 3, 2011 at 7:50 AM, Allan Rube <arube570 at gmail.com> wrote: > I use Thunderbird, not Mail. Since upgrading to 10.7.2, Mail keeps opening. > In the preferences I selected TB as my default mail application. I have not > entered any addresses in mail either. However, it stills opens every few > hours. I cannot delete Mail, any ideas as to what I am doing wrong? -- Nick Scalise nscalise at gmail.com