wp_mail_from not changing from address

Question

I wish to use the wp_mail_from hook to change the from email address submitted through a form which sends an invitation to a friend by email (I am writing my own plugin to do this).

I am using the following code to at present but I cannot see what I am doing wrong as the from email address is not set at all and goes to the default:

function() {
    $this->from_email = $_POST['your_email'];

    add_filter( 'wp_mail_from', array( $this, 'set_from_email' ) );

    wp_mail( $to, $subject, $message);
}

function set_from_email() {
    return $this->from_email;
}

As far as I can tell this should work flawlessly and out of the box but I have tried for hours at no avail hence, my question.

FYI I am using this function inside a class but I do not think that should change anything.

Many thanks, nav

Answer 1

After further investigation things seems to work with sendmail without the WP SMTP plugin. I have also been told by others that the WP SMTP plugin is needed to get email working on Windows hosts and is not needed if running your website on Linux. Hence, I think this was more to do with a specific plugin that to do with my code per se.

I think WP SMTP Mail gives the above behavior for security but I do not know enough about the SMTP protocol to comment further.

Thanks, nav