PHP mail

Tuesday 12/18/2007  –  Category: Uncategorized

How to use the often overlooked fourth parameter while using mail function in php:

bool mail  ( string $to  , string $subject  ,   string $message    [, string $additional_headers    [, string $additional_parameters  ]] )

The additional_parameters parameter can be used to pass an additional parameter to the program configured to use when sending mail using 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.

The user that the webserver runs as should be added as a trusted user to the sendmail configuration to prevent a ‘X-Warning’ header from being added to the message when the envelope sender (-f) is set using this method. For sendmail users, this file is /etc/mail/trusted-users.

Example usage:

mail($email, $subject, $body, $headers, ‘-fnoreply@mydomain.com’)