Actually configure Postfix or Sendmail for PHP mail() is the same. Both of them run the /usr/sbin/sendmail binary. It is quite confusing if we just look at the name of the binary but this is what Postfix did.
For more information, take a look at the Postfix Manual – sendmail.
For the PHP setting, open the /etc/php5/apache2/php.ini and configure the sendmail_path.
php.ini
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; For Unix only. You may supply arguments as well (default: "sendmail -t -i").; http://php.net/sendmail-pathsendmail_path = "/usr/sbin/sendmail -t -i" |
Save the file and restart the Apache server.
Try testing the PHP mail() function by the following command.
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echo testing | mail -s Bla myemail@somewhere.com |
If you need to send with attachment. you can refer to this post.
PHP – Send Attachment with PHP mail()