Title: Error Uncaught Error: Call to a member function createMailEngine()
Last modified: November 23, 2025

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# Error Uncaught Error: Call to a member function createMailEngine()

 *  Resolved [bluesix](https://wordpress.org/support/users/bluesix/)
 * (@bluesix)
 * [6 months, 2 weeks ago](https://wordpress.org/support/topic/error-uncaught-error-call-to-a-member-function-createmailengine/)
 * Using v3.6.1
 * **Fatal error**: Uncaught Error: Call to a member function createMailEngine()
   on null in /home/xxx/webapps/xxx/wp-content/plugins/post-smtp/Postman/PostmanWpMail.
   php:202 Stack trace: #0 /home/xxx/webapps/xxx/wp-content/plugins/post-smtp/Postman/
   PostmanWpMail.php(60): PostmanWpMail->sendMessage() #1 /home/xxx/webapps/xxx/
   wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php(149): PostmanWpMail-
   >send() #2 /home/xxx/webapps/xxx/wp-content/plugins/wordfence/lib/wordfenceClass.
   php(1956): wp_mail() #3 /home/xxx/webapps/xxx/wp-includes/class-wp-hook.php(324):
   wordfence::veryFirstAction() #4 /home/xxx/webapps/xxx/wp-includes/class-wp-hook.
   php(348): WP_Hook->apply_filters() #5 /home/xxx/webapps/xxx/wp-includes/plugin.
   php(517): WP_Hook->do_action() #6 /home/xxx/webapps/xxx/wp-settings.php(578):
   do_action() #7 /home/xxx/xxx/xxx/wp-config.php(45): require_once(‘…’) #8 /home/
   xxx/webapps/xxx/wp-load.php(50): require_once(‘…’) #9 /home/xxx/webapps/xxx/wp-
   blog-header.php(13): require_once(‘…’) #10 /home/xxx/webapps/xxx/index.php(17):
   require(‘…’) #11 {main} thrown in **/home/xxx/webapps/xxx/wp-content/plugins/
   post-smtp/Postman/PostmanWpMail.php** on line **202**

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * (@aqibkhan9)
 * [6 months, 2 weeks ago](https://wordpress.org/support/topic/error-uncaught-error-call-to-a-member-function-createmailengine/#post-18729930)
 * Hello @bluesix ,
 * We hope this message finds you well.
 * Thank you for reaching out to our Support team. We’re truly sorry to hear that
   you’ve encountered this issue.
 * Our team has reviewed the case, fixed the issue, and prepared a **[beta version](https://drive.google.com/file/d/1cxWzw4eSmWUtwkEbpPwaNneToRxUDB0B/view?usp=sharing)**
   of the plugin to address the problems you’ve been experiencing. Kindly download
   and install the beta plugin on your end.
 * Your feedback is extremely valuable to us, so please do share your experience
   after testing.
 * Warm regards,
   Support Team – WP Experts
 *  Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * (@aqibkhan9)
 * [6 months, 2 weeks ago](https://wordpress.org/support/topic/error-uncaught-error-call-to-a-member-function-createmailengine/#post-18735228)
 * Hello @bluesix ,
 * We hope you are doing well.
 * We are marking this thread as resolved due to inactivity. If you encounter any
   further issues, please feel free to open a new thread.
 * Have a great day!
 * Thanks and regards,
   Support Team – WP Experts

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Error Uncaught Error: Call to a member function createMailEngine()’ is
closed to new replies.

 * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655)
 * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/post-smtp/)
 * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * Last activity: [6 months, 2 weeks ago](https://wordpress.org/support/topic/error-uncaught-error-call-to-a-member-function-createmailengine/#post-18735228)
 * Status: resolved