My invoice emails have suddenly stopped being sent to customers, It highlights it as a red field showing there's a delivery issue. Why is this happening?

I understand the importance of sending the invoice on time, rhiannon. However, the delivery issue with your email occurs if the email address is incorrect, the invoices are marked as spam, or there is a temporary issue with the email server. Let's perform some troubleshooting steps to fix the issue.

For the initial solution, reset your email address if you recently imported data into QuickBooks Online.

Here's how:

1. Go to the Gear icon, then select Account and settings.
2. From the Company section, click the Edit icon in Contact info.
3. Review each email address and make changes as needed.
4. Select Save and Done.

If the process above didn't work for you, I suggest asking your customers to check their junk mail and spam folders. If the email is still not found, clear it and then re-enter your email address.

1. Go to the Gear icon and select Account and settings.
2. From the Company section, then select the Edit icon in Contact info.
3. Clear the Company email field and enter the desired address as is, even if it appears correct.
4. Select Save, then Done.
5. Send yourself a test transaction.
6. If you still don't receive the email, try using a different email address that has a different domain (for instance, if you were using a Gmail email address, try a Hotmail or Yahoo address instead).

You can also follow Solution 3 in this article for additional fixes: 3 solutions for when customers aren't receiving your emails.

Once everything's fixed and you're able to send your invoices, learn how to record customer payments in QuickBooks.

Please comment below if you have more questions about your invoices or other concerns in QuickBooks. We're always here to help you.