是否有可能指示PHP在php.ini中使用postfix配置？

Question

Is it possible to configure PHP to send email using the configuration set for postfix?

WordPress (via PHPMailer) relies on these settings to be correct in php.ini:

;SMTP = localhost
; http://php.net/smtp-port
;smtp_port = 25

; For Win32 only.
; http://php.net/sendmail-from
;sendmail_from = [e-mail]

; 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

Postfix is configured to use Google's SMTP server and confirmed as working at the OS (Ubuntu 14.04) level

PHPMailer fails (from WordPress) with the error:

Could not instantiate mail function.

Answer 1

Turns out because I was using php-fpm, there were settings I wasn't aware were set living in /etc/php5/mods-available/zzzz_custom.ini.

Adding the sendmail path to that file worked for me :

sendmail_path=/usr/sbin/sendmail -t -i