Hi @brillinfotech
Thanks for reaching out.
It is great that you have already installed WP Mail Logging. I understand that its logs are showing that the emails are generated and delivered.
it never reaches to users
First of all you’d want to check whether by any chance the emails are landing into the users’ spam folders. That is a strong possibility.
If that isn’t the case, that means the server is blocking them from being sent further. If there is nothing wrong with the receiving account and it definitely did not go to spam, you could ask your hosting provider if they are aware of any config changes or network issues impacting email. You may inform your host to help troubleshoot this using the guide below: https://kb.mailster.co/smtp-error-data-not-accepted/
Failing that, our Email troubleshooting guide has instructions for setting up an SMTP provider to deliver emails instead: https://woocommerce.com/document/email-faq/ . This can be more reliable in some cases.
We have a detailed guide on troubleshooting WooCommerce email issues here: https://docs.woocommerce.com/document/email-faq/
If the issue persists, could you please navigate to WooCommerce > Status > Logs and from the dropdown on the right side, please see if there are any logs starting with the words fatal-error
? Please let us know what you find.