1. Verify which method is used to send emails in QuickBooks.
2. Open the QuickBooks company file.
3. Go to Edit> Preferences> Send Forms> WebMail
4. Click on the Default Email
5. Click on Edit.
6. Uncheck Use enhanced security.
7. Email again.

If you continue to have issues, we recommend contacting Intuit Support for assistance.

To contact Intuit Support, please see the numbers listed below:

Intuit - 866-340-7237

Intuit Canada - 866-935-7237

If Intuit does return a solution that requires our assistance, please let us know and we will work with their instructions.