Hey @johnson17,
Having two errors in their server environment under woocommerce status.
Regarding the two errors you shared, I recommend contacting your web host to discuss both of them as changes to the server configuration will be required to enable both those services.
The email was back logged but didn’t send out.
As the email was logged but not sent/ received by your customer this means that WooCommerce is using the standard WordPress systems to send the email but after that point, there is an issue somewhere in the process of the email leaving your server and being received by the external email service.
If you refer to the documentation my colleague linked to you’ll find a section on what to do if the email was sent, but not received.
After working through the steps outlined in the documentation you can place test orders on your website to confirm if the order emails are received.
Please let us know how you get on with that!
Kind regards,