Is anyone having their QuickBook Invoices being rejected in Email with the error Delivery Server Down - is this a Quickbooks issue or how can I resolve this issue?

Yes I am having the same issue. Every single invoice I have sent says undelivered.

Greetings, @t2bconstruction, and @BrookBrandAdminNate. We understand the frustration of not having this process as anticipated and the significance of getting this fixed as quickly as possible. I'll provide the steps for contacting our support team in QuickBooks Online.

Please know that our team is moving a potential remedy for this error experienced with the same issue you mentioned about the Delivery Server Down message.

In the meantime, you can download the sales forms and send this manually through other resources outside QuickBooks: Download and save sales forms and statements in QuickBooks Online.

In this case, I motivate you to call our support team so they can add you to the affected users.

Please see the steps below:

1. Log in to your account.
2. Click the? Help button at the top right corner.
3. Go to the Search tab, then select Contact Us.
4. Enter a brief discussion with your concern, then click Continue.
5. Choose to Get a callback to connect to us.

I'm adding this page if you need other resources that help you manage your profit and loss: Financial reports.

We are doing our best to resolve this issue. I appreciate your patience. Keep safe.