Full error message:

OW Debug - Exception
Message: Could not instantiate mail function.
File: /var/www/friendly/data/www/friendly.ru/ow_libraries/php_mailer/class.phpmailer.php
Line: 595
Trace:
 
#0 /mysitename/ow_libraries/php_mailer/class.phpmailer.php(519): PHPMailer->MailSend('Date: Thu, 20 F...', '--b1_c6a1ad9638...')
#1 /mysitename/ow_system_plugins/base/bol/mail_service.php(274): PHPMailer->Send()
#2 /mysitename/ow_core/mailer.php(97): BOL_MailService->send(Object(BASE_CLASS_Mail))
#3 /mysitename/ow_system_plugins/base/bol/user_service.php(1378): OW_Mailer->send(Object(BASE_CLASS_Mail))
#4 /mysitename/ow_system_plugins/base/controllers/user.php(68): BOL_UserService->processResetForm(Array)
#5 [internal function]: function name here
#6 /mysitename/ow_core/request_handler.php(266): ReflectionMethod->invokeArgs(Object(BASE_CTRL_User), Array)
#7 /mysitename/ow_core/application.php(330): OW_RequestHandler->dispatch()
#8 /mysitename/index.php(65): OW_Application->handleRequest()
#9 {main}

Human readable explanation of the error message: phpMailer library tried to send a message using the php mail() function and the php mail() function returned “false”.

Two most common causes of this error message are - server settings - phpmailer libraries used within Oxwall.

Since mail functions are part of the PHP's core, first of all make sure that PHP was configured/compiled correctly on your server to send emails. Run following test to see whether php mail script is working.

Create a file called testing_mail.php in /public_html/ directory on your server. Add one of the following codes into this file:

1.

 <? $headers = 'From:any_sender_email@example.com'; mail('recepient@example.com', 'Test email using PHP', 'This is a test email message', $headers, '-fany_sender_email@example.com');?> 

2.

 <?php $to = 'recepient@example.com'; $subject = 'Test email using PHP'; $message = 'This is a test email message'; $headers = 'From: any_sender_email@example.com' . "\r\n" . 'Reply-To: webmaster@example.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers, '-fany_sender_email@example.com'); ?> 

Where any_sender_email@example.com - your sender's email -fany_sender_email@example.com - same sender's email but with “-f” at the begining. recepient@example.com - your recipient's email.

Make sure to replace those values in the testing_mail.php by existing email addresses.

Run created file by opening www.yoursitename.com/testing_mail.php in any browser. You should see blank page. Check the email you have set for “recepient@example.com”.

If you don't receive testing email php mail script is not working.

1. Check whether phpmailer library is installed/enabled/configured
2. Check whether php mail() function is installed/enabled/configured

Best way to check this, is to contact your hosting provider.

1. If your hosting company confirms that both are enabled/configured properly,

If you receive testing email, php mail script is working on your server. In this case, “Could not instantiate mail function” is most likely to be caused by php mailer libraries used in Oxwall.

So you have made sure