eoghanobrien/php-simple-mail — pull request #3 by gabalis (2012-01-12 15:38:24+00:00)
Title: Support for additional parameters

The additional_parameters parameter can be used to pass additional flags as command line options to the program configured to be used when sending mail, as defined by the sendmail_path configuration setting. For example, this can be used to set the envelope sender address when using sendmail with the -f sendmail option.

cf http://php.net/manual/en/function.mail.php

Signed-off-by: Matthieu Baudoux