Thank you for getting back to us, @fairfield-impex.
I can share some information that can help you with clearing the prompt.
Since you're still having the "There was an issue delivering some of your emails. Please check the mail log for more details." prompt after trying the steps provided by MariaSoledadG, I suggest reaching out to our Customer Support team. They can verify why you're continually receiving this message and help you in clearing it. In the meantime, you can clear them manually by deleting the message.
You can reach our Customer Support for QuickBooks Online (QBO) by going to the Help icon at the top right of the account. Follow the steps below:
- Go to the Help icon to connect to a live support agent.
- Provide us with some information about your concern.
- Select the Contact Us button and provide some details about this concern, then on the Let's talk button.
- You'll now be provided options on how to connect to our Customer Support.
You can check this article for more information about the different types of support we offer and their availability: QuickBooks Online Support.
In case you'll encounter an error when trying to send an invoice or estimate to your customers, refer to the following article on how to resolve it: Delivery Errors when trying to email a sales form.
I'm always here if you need help in clearing the error message you've received. Just let me know by leaving a reply below. Have a great rest of the day!
