Thanks for chiming in here in this thread, Trisha. I'd like to provide you with some comprehensive insights regarding the process of sending emails within QuickBooks Online (QBO).

To begin, could you please confirm if you have encountered any specific error messages while using your QBO account? Any additional details would be greatly appreciated.

In QBO, if the email address is incorrect or there's a temporary issue with the recipient's email server, an email will bounce or fail to deliver. To assess whether the issue lies with the recipient's email address, I recommend sending a test email to your personal email account. If that test email goes through successfully, it suggests that there could be an issue on the recipient's end. In this case, it would be prudent for them to contact their email service provider for further assistance.

Moreover, it’s essential to consider your internet connection. Ensure your connection is stable and reliable, as a weak or intermittent connection can result in disruptions when sending emails. If you've confirmed a stable connection but are still experiencing difficulties, you might want to attempt sending emails using a private browsing window or switch to another supported browser.

For additional support, I'm including this article that outlines various tips for resolving delivery errors in QuickBooks: Fix the Delivery Server Down error in QuickBooks Online.

I genuinely appreciate the opportunity to assist you with your email-related queries in QuickBooks Online. Should you have any more questions or require further clarification, please don’t hesitate to leave a comment below. I’m here to ensure you have a smooth and efficient experience in your QuickBooks journey.