i am getting this error :
SMTP Error: Could not authenticate.
Warning: Cannot modify header information - headers already sent by (output started at /home/socialex/public_html/plugins/phpmailer/class.phpmailer.php:586) in /home/socialex/public_html/inc/design.inc.php on line 101
I didn't change anything so i wonder where this modification came from? and how can i fix it?