Hello there, @jeggertz.
Thank you for reaching out to the Community. It's my priority to help you sort this Here are some of the possible reasons why you're getting this warning.
Here are the possible reasons why you're getting an error prompt:
- The email preference is being set incorrectly.
- A damaged QuickBooks installation.
- The domain admin was blocked.
- Account security settings from your email provider.
Let's first make sure that your QuickBooks software is updated to the latest version. QuickBooks periodically provides maintenance release and product (software) updates to fix emailing concerns, add features and enhancements, and update compliance information.
Once done, you can check the web mail's settings in the preferences. Here's how:
- At the top menu bar, click Edit.
- Choose Preferences.
- Click Send Forms on the left panel.
- Under the My Preferences tab, select the email account you're using.
- Click Edit.
- Mark the SSL box, or just select Default.
- In the Server Name field, make sure the server name matches your email provider's settings.
You can check out these recommended articles for more details:
Should you need more help with sending invoices via email, please let me know. I'm more than willing to lend a hand.
