For QuickBooks not sending emails, first verify email settings. Update QuickBooks, check firewall settings, and confirm compatibility with your email provider. Reset your email preferences in QuickBooks, restart the software, and try sending a test email, check firewall settings, confirm compatibility, reset preferences, restart. QuickBooks assistance for more help in fixing the email sending issue. For instant assistance contact our QuickBooks Experts Team at 1.833.460.2030.