Why are my estimates not being emailed?

QuickBooks Investigation Team is working on the investigation: INV-109166 (Unable to send Sales Form emails to ALL customers, emails not received). 

Hi there, Mike.

Welcome to the Community space. I'm here to assist you in getting the best possible help for your concerns about undelivered emails.

Currently, our product engineers are investigating this issue. I recommend contacting our QuickBooks live agent to be added to the list of affected users and get investigation updates through your email.

Here's how:

1. Go to this link: Contact Us.
2. Select QuickBooks Online product and click Continue.
3. Select Contact Us and choose a way to connect with us:

• Start a chat with a support expert.
• Get a callback from the next available expert.

Thank you so much for your understanding and patience. We truly value your support and are working hard to resolve this issue as soon as possible.

Additionally, I'd like to include these articles for your future reference while using QuickBooks Online:

• Troubleshoot if customers aren't receiving emails from QuickBooks Online.
• Record invoice payments in QuickBooks Online.

Please don't hesitate to come back here on the community page if you have additional concerns with emailing customers using QuickBooks Online. I'd gladly assist you at any time.