[support] Email notifications in Drupal 6.14

Hello All, I have installed drupal 6.14 in office as an Intranet site, for office use only. As I have created new users "Account Activation mail" is not firing. also users are not getting mails for New Password Request. How to overcome this problem? -- Thanks & Regards, Mandar Bartakke ++++++++++++++++++++++++++++++++ मी योगासनं शिकावी म्हणतोय, पण योग येत नाहीये!