Warning: ini_set() has been disabled for security reasons

Viewing a completed order in admin. Adding comments, changing status to Delivered, with Append Comments and Notify Customer checked, then clicking the Update button gives:```
Warning: ini_set() has been disabled for security reasons in /home/awakened/public_html/secureshop/includes/classes/class.phpmailer.php on line 447

Warning: ini_set() has been disabled for security reasons in /home/awakened/public_html/secureshop/includes/classes/class.phpmailer.php on line 456

Warning: Cannot modify header information - headers already sent by (output started at /home/awakened/public_html/secureshop/includes/classes/class.phpmailer.php:447) in /home/awakened/public_html/secureshop/admin/includes/functions/general.php on line 21

Zen Cart 1.3.8a
Database Patch Level: 1.3.8

Server OS: Linux 2.6.18-028stab059.6
HTTP Server: Apache/1.3.41 (Unix) mod_log_bytes/1.2 mod_bwlimited/1.4 mod_ssl/2.8.31 OpenSSL/0.9.7a
PHP Version: 5.2.8 (Zend: 2.2.0)   PHP Memory Limit: 64M
PHP Core disable_functions: 
(local value)	show_source, passthru, popen, proc_open,ini_set	
(master value) show_source, passthru, popen, proc_open,ini_set

Sounds like you're with a hosting company that's slapping on security restrictions willy-nilly in a panic instead of properly securing the server.

You should NOT have to do this, but if your hosting company isn't willing to secure their server more efficiently you'll have to manually edit lines 447 and 456 of the class.phpmailer.php file and add an @ symbol in front of the ini_set() function call on both lines to cause PHP to ignore the error.
That doesn't really solve anything other than suppressing the display of the error message. The problem will still exist, and you may actually have trouble getting the emails to go through due to the break in functionality caused by the PHP restrictions imposed by your host.

I would expect that all emails from your store are equally affected, both admin and storefront.

Problem solved, thanks!

I've contacted my host.

We managed to solve this using PHP. (the client's hosting company was refusing to change server settings)

in class.phpmailer.php on line 446 447
change:
$old_from = ini_get("sendmail_from"); global $sendmail_from; $sendmail_from = ini_get("sendmail_from");
$sendmail_from = $this->Sender; //ini_set("sendmail_from", $this->Sender); $sendmail_from = $this->Sender;

line 455 456
change:
if($old_from) //if (isset($old_from))
$old_from = $sendmail_from;

in header_php.php line 400
change:
global $sendmail_from; //$sendmail_from = @ini_get("sendmail_from");