I'm not sure if being on Windows affect mail settings.
Anyway I'm using Windows and these are my settings:
$wgEnableEmail = true;
$wgEnableUserEmail = true;
$wgEmergencyContact = "Company name <admin(a)company.com>"m>";
$wgPasswordSender = $wgEmergencyContact;
$wgSMTP = array(
'host' => "mail.company.com",
'IDHost' => "company.com",
'port' => 25,
'auth' => false,
'username' => "mailusername",
'password' => "mailuserpassword"
);
$wgEmailAuthentication = true;