I’m here to help sort this out so you can send invoices successfully in QuickBooks, Hamid.
The error message you received usually indicates that the email address you're trying to send the invoice to is incorrect. Bear in mind that when the email settings are misconfigured, QuickBooks users may encounter issues sending invoices.
You’ll want to double-check the email address you entered for the recipient to resolve this. Here are the steps to do it:
- Go to your Sales menu, then click the Customers tab.
- Select the customer you’re trying to send an invoice.
- Click Edit.
- Check the email address and edit it if needed.
- Resend the invoice.
You can also try logging into your QuickBooks account using an incognito window or other supported browsers to narrow down the results and determine if this is related to a browser issue. Once verified, please clear its cache.
Check out this guide to learn more about managing undelivered invoices in the program: Fix undelivered invoices.
When resolved, you can use these resources to record customer payments, make deposits, and put them into the right accounts:
If you have more questions or concerns about operating your sales transactions, don’t hesitate to get back and add a reply below. I’ll be here.