Emails are not sending even when they say sent.??

Hello there, userjpye504.

If they aren’t receiving the transactions you've sent, we can create a test customer that has your email account. Then, send out a test invoice to yourself and see if you receive the email.  If you've received it, let your customer check their spam folder. 

If not, you'll need to reset your company email address. Here's how:

1. Go to the Gear icon.
2. Select Account and Settings under Your Company.
3. In the Contact info section, review each email address, then make changes as needed.
4. Click Save. Then, Done.

For other solutions, you can check this article: 3 solutions for when customers aren't receiving your emails. You can proceed with Solution 2 and Solution 3.

If you need any assistance concerning your QuickBooks, please don't hesitate to reach out here. Take care and have a good one!