How to Resolve QuickBooks Could Not Connect to Email Server The frequent connectivity issue QuickBooks Could Not Connect to Email Server stops emails from being sent via QuickBooks. It happens because of improper email settings, network problems, or security limitations. For the majority of users, updating server information, verifying credentials, and modifying firewall settings typically help solve the issue effectively. For expert assistance with QuickBooks, dial 1.855.738.2784. URL: https://accountinghelplinesupport.weebly.com/blog/quickbooks-unable-to-send-emails-due-to-network-connection-failure-error-fix-it