Welcome to the Community. I'm here to help send your invoices by batch.
It's possible that the email address entered is incorrect or there's a temporary issue with the recipients email server. Let's verify the email address by pulling up the Customer Contact List report. Here's how:
Go to Reports and click Customer Contact List.
Click the Gear icon on the report and choose Email to show all your customer's email address.
Currently, there’s an ongoing investigation concerning undeliverable emails. Our engineers are now working on a fix. I recommend contacting our Customer Care team so you’ll be added to the list of affected users.
You’ll receive notification updates via email once the resolution is implemented. You can check this link here about our support hours so you’ll be assisted right away. Then follow these steps here to get in touch with them:
Select the Help menu.
Click Talk to a human.
Enter this on the field “email issue.”
Select I still need a human, then press Contact us.
Choose to Get a callback.
Let me share an article about customizing sales forms in QuickBooks Online. This feature will enable you to send forms with a more professional look that showcases your brand.
Just leave us a message if you have other concerns besides your emails. The Community team is always here to assist you.