title: Is it possible to instruct PHP to use postfix configuration in php.ini?
body: <p>Is it possible to configure PHP to send email using the configuration set for postfix?</p>
  
  <p>WordPress (via PHPMailer) relies on these settings to be correct in php.ini:</p>
  
  <pre><code>;SMTP = localhost
  ; http://php.net/smtp-port
  ;smtp_port = 25
  
  ; For Win32 only.
  ; http://php.net/sendmail-from
  ;sendmail_from = me@example.com
  
  ; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
  ; http://php.net/sendmail-path
  sendmail_path = "/usr/sbin/sendmail -t -i"
  
  ; Force the addition of the specified parameters to be passed as extra parameters
  ; to the sendmail binary. These parameters will always replace the value of
  ; the 5th parameter to mail().
  ;mail.force_extra_parameters =
  
  ; Add X-PHP-Originating-Script: that will include uid of the script followed by the filename
  mail.add_x_header = On
  
  ; The path to a log file that will log all mail() calls. Log entries include
  ; the full path of the script, line number, To address and headers.
  mail.log = /var/log/mail.log
  ; Log mail to syslog (Event Log on Windows).
  ;mail.log = syslog
  </code></pre>
  
  <p>Postfix is configured to use Google's SMTP server and confirmed as working at the OS (Ubuntu 14.04) level</p>
  
  <p>PHPMailer fails (from WordPress) with the error:</p>
  
  <blockquote>
    <p>Could not instantiate mail function.</p>
  </blockquote>