[support] Bug? Email function always read php.ini

[Drupal Indonesia]

Hi,

Note that this installation is doing on a sub folder: C:\wamp\www\test123\

I got this error: mail() [function.mail]: SMTP server response: 550 
<coba at test.com>, Recipient unknown in C:\wamp\www\test123\modules\user.module on 
line 430.

I found that line 1085: $from = variable_get('site_mail', 
ini_get('sendmail_from'));
above line can't get first argument but always do ini_get('sendmail_from') which 
mean reading the php.ini. This line should read drupal {variable} table first 
before read the php.ini.

This is a bug?