My emails suddenly are not going through. I get this error message "Unable to authenticate with the current session's credentials." How di I fix this?

Hello @blincoln.

I'll make sure that you can send invoices in QuickBooks Desktop. Let's perform some troubleshooting to isolate this issue.

Based on the error message, you may need to recheck admin privileges 

You can start by updating QBDT to the latest release. Here's how:

1. Go to the Help menu at the top and pick Update QuickBooks Desktop on the drop-down.
2. On the Options tab, click Mark All, then Save.
3. Then go to the Update Now tab and mark the Reset Update box, then select Get Updates.

Once done, close and rerun QBDT.

Then, make sure to check the settings in the webmail preferences. Let me show you how:

1. Go to the Edit menu and select Preferences.
2. On the left pane, choose Send Forms.
3. Under My Preferences, select the email account you are using and click Edit.
4. In the Edit Email Info screen, go to the SMTP Server Details section and set the server name and port to your email provider settings.

Please refer to this article for the list of SMTP Server and Ports: Set up email service.

If you encounter any error messages when sending invoices, please check out this article for additional troubleshooting options: Fix Error: Could not connect to the email server.

Please let me know if this gets you back to business. I'll keep an eye out for your response. Stay safe and well!

I am having this issue and the fixes are not working, Mac 2019

Hi there, Kosmic1.

Let's perform extra steps so you can send email using QuickBooks Desktop for Mac.

To start, let's check the system requirements to make sure your email account is compatible with your QuickBooks version. For more information, you can visit this article: System Requirements.

Then, let's make sure that your Gmail account is used as the default email from the Apple Mail menu. This ensures the program sends your sales forms through the default email. I'll show you how.

1. Click the Apple Mail.

2. Select Preferences.

3. On the Preferences pane, choose General.

4. Confirm Gmail is your default email account. If not, set your default email to Gmail.

Once done, send an email again. If the issue persists, I'll suggest contacting our phone support. They have the tools to check your account in a secure session.

I'll include this article QuickBooks for Mac see page 228. This contains detailed steps to help you manage your account. 

I'm just a post away if you have any other questions about sending emails. Wishing you and your business success.