Title: Ajax error
Last modified: May 7, 2019

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# Ajax error

 *  [whateverfree2](https://wordpress.org/support/users/whateverfree2/)
 * (@whateverfree2)
 * [7 years ago](https://wordpress.org/support/topic/ajax-error-39/)
 * My website working normally until yesterday. When user checkout at the last step.
   In case display the Receipt page, the website display “Error 500”.
 * It takes me a day to test and found Post SMTP make the issues. Not sure why but
   when I test send email again I get error “Ajax error”
 * Disabled it and website working back. Anyway, lost tons of traffic and customers.
 * Please fix!

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [whateverfree2](https://wordpress.org/support/users/whateverfree2/)
 * (@whateverfree2)
 * [7 years ago](https://wordpress.org/support/topic/ajax-error-39/#post-11503060)
 * Seem it conflicted with Wordfence premium
 *  [dblinks](https://wordpress.org/support/users/dblinks/)
 * (@dblinks)
 * [7 years ago](https://wordpress.org/support/topic/ajax-error-39/#post-11505542)
 * Are you using Sendgrid API ??
 * I’m getting the same “Ajax Error” but without Wordfence (I don’t use Wordfence).
   There may be a stray value in my database I haven’t tracked down yet.
 * I referenced my php output failure here: [https://wordpress.org/support/topic/php7-2-upgrade-sendgrid-failure/](https://wordpress.org/support/topic/php7-2-upgrade-sendgrid-failure/)
 *  Thread Starter [whateverfree2](https://wordpress.org/support/users/whateverfree2/)
 * (@whateverfree2)
 * [7 years ago](https://wordpress.org/support/topic/ajax-error-39/#post-11506387)
 * Yes, I am using Sendgrid API to send

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Ajax error’ 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/)
 * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [whateverfree2](https://wordpress.org/support/users/whateverfree2/)
 * Last activity: [7 years ago](https://wordpress.org/support/topic/ajax-error-39/#post-11506387)
 * Status: not resolved