11-05-2006, 10:05 AM
Although it is private function (called when you click Accounts in Send Email Message dialog), it will not be removed in the future, and it is safe to use it in macros.
Also read "Email help" macro.
Default email account is specified in registry key Software\Microsoft\Internet Account Manager, in HKEY_CURRENT_USER. Sorry, I don't remember what value must be changed. You'll see it in registry editor.