Cron not sending wp-mail()

Question

I have a problem with a cron schedule function, it does not want to send an email with the wp_mail() function.

This is my code:

It is placed in the functions.php

<?php

    add_filter('cron_schedules', 'add_review_invites_schedule');
    function add_review_invites_schedule($schedules){
        $schedules['send_review_invites_interval'] = array(
                'interval' => 5*60,
                'display' => __('Every Five Minutes'),
        );
        return $schedules;
    }

   if (!wp_get_schedule('send_review_invites_event')) {
       wp_schedule_event( time(), 'send_review_invites_interval', 'send_review_invites_event');
   }

   add_action( 'send_review_invites_event', 'send_review_invites' );

   function send_review_invites(){
       echo 'test';
       wp_mail( 'me@example.com', 'Automatic email', 'Automatic scheduled email from WordPress to test cron');
   }

?>

Some things you should know I have connected the wp-cron to my server cron so it runs this code on my website. I have also put define('DISABLE_WP_CRON', false); in the wp-config.php.

The output I get in my mail when the server cron runs, echos test. This shows me that the function send_review_invites() is being run. Yet somehow I don't get another email on the email address given in the wp_mail() function.

Thanks in advance for your help.

Answer 1

You can test if mail has been sent or not using the following:

// Set $to as the email you want to send the test to.
$to = "you@yoursite.com";

// Email subject and body text.
$subject = 'wp_mail function test';
$message = 'This is a test of the wp_mail function: wp_mail is working.woo!';
$headers = '';

// Load WP components, no themes.
define('WP_USE_THEMES', false);
require('wp-load.php');

// send test message using wp_mail function.
$sent_message = wp_mail( $to, $subject, $message, $headers );

//display message based on the result.
if ( $sent_message ) {
    // The message was sent.
    echo 'The test message was sent. Check your email inbox.';
} 
else {
    // The message was not sent.
    echo 'The message was not sent!';
}

Check whether your server is configured correctly to send emails, which wp_mail() requires. When in doubt, you can also try using SMTP to confirm it. By using the SMTP method, if it delivers the mail then your problem is with your mailserver.

Answer 2

In addition to @Vishwa answer you could log the wp_mail() function according to this link: Wordpress reference

add_action('wp_mail_failed', 'log_mailer_errors', 10, 1);
function log_mailer_errors( $wp_error ){
  $fn = ABSPATH . '/mail.log'; // say you've got a mail.log file in your server root
  $fp = fopen($fn, 'a');
  fputs($fp, "Mailer Error: " . $wp_error->get_error_message() ."\n");
  fclose($fp);
}