QEM Email Delivery Issues

Introduction

If your Quick Event Manager (QEM) attendees report missing emails, this guide will help you identify where the problem lies in the email delivery chain.

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Understanding Email Delivery Chain

Email delivery involves multiple steps, each of which can affect successful delivery:

1. QEM plugin sending the email
2. Your WordPress host server or email service plugin
3. Recipient’s email server (spam/greylisting)
4. Recipient’s email client (spam/rejection filters)

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Enable Debug Mode for Investigation

Add these lines to your wp-config.php to track email sending:

define(‘WP_DEBUG’, true);
define(‘WP_DEBUG_DISPLAY’, false);
define(‘WP_DEBUG_LOG’, true);

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Testing and Monitoring

1. Test email sending by:

• Registering for a test event
• Using the email report options

1. Locate the debug log:

• Find debug.log in your wp-content directory
• You can safely delete this file if it becomes too large

1. Analyzing the log:

• Search specifically for “QEM Email” entries
• Key messages to look for:

Understanding Log Messages:

“QEM Email message about to send”
✓ This means your plugin is working correctly

“QEM Email – wp_mail error msg”
⚠️ This means your plugin works but your server/email service is failing

“QEM Email – wp_mail responded OK”
✓ This means the email was successfully sent to your mail service

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Common Issues and Solutions

• If no “QEM Email” entries appear:
  • Check autoresponder settings
  • Verify PayPal IPN setup if using payment confirmation
  • Contact QEM support for assistance
• If emails fail after “wp_mail error”:
  • Review server email configuration
  • Check email service plugin settings
  • Verify SMTP credentials if applicable
• If emails show “responded OK” but aren’t received:
  • Check for IP blacklisting
  • Verify SPF records
  • Review DNS pointer configuration
• Consider switching to a transactional email service:
  • MailGun
  • SendGrid
  • Amazon SES

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After Investigation

1. Disable debug mode:

define(‘WP_DEBUG’, false);

2. Delete the debug.log file

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Professional Support

For complex delivery issues, consider:

• Consulting an email delivery expert
• Implementing a dedicated email service
• Following provider-specific setup guides carefully
• Consider using Fullworks’ managed Events for WordPress QEM service

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Need Help?

Contact QEM support if you need assistance interpreting debug logs or resolving persistent issues.

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Updated on April 17, 2026 · Need help? Open a support ticket