I have one particular customer (email address) in which my emailed invoices have stopped being delivered to, how do I fix this issue?

Hi Scott,

Thanks for reaching out. Sending e-invoices through QuickBooks Online is a great way to optimize your invoicing process and maximize your cash flow. I'll be happy to assist you with this.

Given that you were able to send invoices to this particular customer address before and other customers can receive your e-invoices, I'd recommend reaching out to the email provider to find out if there's any server issues or block on their end. If not, you can ensure your browser or app is running the program as designed by following the troubleshooting steps in this article: Clear cache and cookies to fix issues when using QuickBooks Online

If your emailed invoices are still undelivered after this, please reach out to our tech support team for us to investigate this further. Here's how to reach us. 

Phone and Chat: Click Contact Us to learn how to reach phone and chat support.

Schedule a Callback: click (?)Help in the upper right > click Contact Us > explain your situation > click Let's Talk > choose Get a callback (Note: Callback hours are the same as regular phone hours.)

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Have a great day!