Hi all, 

Currently, the error you stated above is being investigated by our engineers. Error: QuickBooks is unable to send emails due to network connection failure" when sending emails using Gmail account.

I understand that this needs to be fixed as soon as possible. While our engineers are looking into this, I recommend contacting our Support Team to add your company details as one of the affected users.

Within your QuickBooks Company file, select QuickBooks Desktop Help from the Help menu. You can also press F1 on your keyboard to bring up the same Help panel. 

Alternatively, we can use the link below to contact us outside QuickBooks Desktop company file.

1. Go to this link: Contact Support Team.
2. Enter your full name and email address.
3. Then, follow the on-screen instruction to complete the process.

Rest assured we will provide an update once information is available. If you haven't tried these the details below, you may consider doing it and see if it can help.

• Use a different webmail provider like yahoo or outlook.com
• Use another method like Outlook or QuickBooks Email service if available.
•  Try sending 3 at a time to see if it works.

 Additionally, you can visit this article for more details about enhancing security in Gmail for QuickBooks Desktop: Achieve enhanced security when using QuickBooks Desktop with Gmail.

We recognize the inconvenience caused by the error you encountered, and we appreciate your patience. Our team is working diligently to investigate and rectify the issue, aiming to restore a seamless experience for our customers.