I appreciate you for following the steps mentioned above, charger68. With this, I'll ensure you'll be routed to the right team to assist you further on why you're still incapable to send an email in QuickBooks.

If you're using the QuickBooks Online version, I recommend contacting our Support Team since the issue continues to occur. They have the tools to pull up your account in a secure environment and be able to investigate why you're still getting the error message stating the password is incorrect.

Here's how to contact them:

1. Open your QuickBooks Account.
2. At the top right, click the Help icon.
3. Choose the Assistant section.
4. Type your concern in the Type something field.
5. Click Talk to a human.
6. Click I still need a human.
7. Click the Get help from a human.
8. You'll be routed into the How can we help? page. Then, select callback or how you want to contact them and fill in the information.

If you're using the Desktop version, we recently received a report about being unable to send emails in QuickBooks. Our product team is working to fix this as soon as possible.

For now, you can try running both QuickBooks and MS Outlook as admin as a workaround to be performed. Please follow the steps below.

1. Close QuickBooks Desktop. Then, open the Windows Start menu.
2. Select QuickBooks into the search bar. Then, right-click the QuickBooks icon and select Open file location.
3. In the folder, right-click the QuickBooks.exe file and choose Properties.
4. Choose the Compatibility tab.
5. Select to check the Run this program as Administrator option. 
6. Click Apply and OK.

Then, I also recommend contacting our QuickBooks Desktop Support Team, so they can add you to our notification list. This will help our engineers determine the number of affected users. You'll also receive an update through email once this has been resolved.

Additionally, we removed your email address to keep you safe from scam emails and to prevent your credentials from being used in any unauthorized businesses.

Lastly, you may refer to each article below on how to send sales forms by batch. Then, how you can personalize and add specific info to your sales forms before you send them to your customers.

• Email sales forms, invoices, and statements in QuickBooks Desktop.
• Customize invoices, estimates, and sales receipts in QuickBooks Online.

Please don't hesitate to let me know if you need further assistance while you using QuickBooks or working with your sales form. You can drop a comment below, and I'll gladly help, charger68. Wishing you continued success and stay safe!