[Plugin: Subscribe2] prevent users from sending bulk e-mail

@barrydocks,

By default this feature is restricted to users with a role of Author and above. If you want to restrict it further create your own little plugin with this code, it will restrict to to admins only.

function s2_admin_changes( $capability, $menu ) {
    if ( $menu == 'send' ) {
        return 'manage_options';
    }
    return $capability;
}

add_filter('s2_capability', 's2_admin_changes', 10, 2);

There’s a little more detail on that code in the FAQs.

@mattyrob

Thanks for this. I have tryied it but get the following error after installing the plugin:

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 697

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 698

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 699

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 700

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 701

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 702

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 705

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 706

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 707

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 708

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 711

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 712

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 713

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 714

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/wp-activity/wp-activity.php on line 306

Warning: Cannot modify header information - headers already sent by (output started at /var/sites/o/oculuscura.co.uk/public_html/wp-content/plugins/subcribe2_stop_bulk_email/subscribe2_stop_bulk_email.php:21) in /var/sites/o/oculuscura.co.uk/public_html/wp-includes/pluggable.php on line 881

Here is the plugin code:

<?php
   /*
   Plugin Name: Subscribe2_stop_bulk_email
   Plugin URI: https://my-awesomeness-emporium.com
   Description: Subscribe2 - Prevent users from sending bulk e-mails
   Version: 1.0
   Author: Adrian
   Author URI: https://mrtotallyawesome.com
   License: GPL2
   */
function s2_admin_changes( $capability, $menu ) {
    if ( $menu == 'send' ) {
        return 'manage_options';
    }
    return $capability;
}

add_filter('s2_capability', 's2_admin_changes', 10, 2);
?>

I suspect it is more due to my lack of php coding skill, please could you suggest an amendment to will make it work??!!

@barrydocks,

That code looks fine to me, I even pasted it into a file and tested it myself and it worked fine – no errors on activation or anywhere that I could find on my site.

It might be a character encoding issue so try pasting the code from above back into your plugin file and see if that helps.

@mattyrob

Thanks, all working now!